Document EmqLyBd46N6N7rRmb5r9OYV1L
HAZLETON
WASHINGTON
9 2 0 0 LEESBURG PIKE
VIENNA. VA. 221B2-1699
A R a x -o ^
15515-0-454
MUTAGENICITY TEST ON T-5711
IN AN IN VIVO RAT HICRONUCLEUS ASSAY
DATA REQUIREMENT U.S. EPA FIFRA Guideline 84-2
FINAL REPORT
AUTHOR Hemalatha Murli, Ph.D.
PERFORMING LABORATORY Hazleton Washington, Inc.
9200 Leesburg Pike Vienna, Virginia 22182
LABORATORY PROJECT ID HWA Study No.: 15515-0-454
SUBMITTED TO 3M Corporation
3M Center St. Paul, Minnesota 55144
STUDY COMPLETION DATE April 30, 1993
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STATEMENT OF DATA CONFIDENTIALITY CLAIMS
Information claimed confidential on the basis of its falling within the scope of FIFRA 10(d)(1)(A),(B), or (C) has been removed to a confidential appen dix, and is cited by cross-reference number in the body of the study.
Company : ___________________________________ Company Agent : ____________________________
(Typed Name)
(Title)
Signature
Date
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GOOD LABORATORY PRACTICE COMPLIANCE STATEMENT
This study was conducted in compliance with the EPA FIFRA Good Laboratory Practice Standards as set forth in Title 40 of the U.S. Code of Federal Regulations Part 160. Any significant deviations from the protocol and/or GLP are attached as an appendix to this report. There were no deviations from the aforementioned regulation which affected the quality or integrity of the study or the interpretation of the results in this report.
Study Director:
Hemalatha Murli, Ph.D. Mammalian Cytogenetics Department of Molecular and Cellular Toxicology Study Monitor:
Applicant/Submitter:
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QUALITY ASSURANCE STATEMENT
PROJECT TITLE: IN VIVO RAT MICRONUCLEUS ASSAY
PROJECT NO.: 20996
ASSAY NO.: 15515
PROTOCOL NO.: 454
EDITION NO.: 5
Quality Assurance inspections of the study and/or review of the final report of the above referenced project were conducted according to the Standard Operating Procedures of the Quality Assurance Unit and according to the general requirements of the appropriate Good Laboratory Practice regulations. Findings from the inspections and final report review were reported to management and to the' study director on the following dates:
Inspection/Date
Findings Reported
Weighing of Test Article-3/2/1993 3/02/1993
Draft Report Review-4/16,19/1993 4/23/1993
Final Report Review-4/30/1993
4/30/1993
Auditor K. Newland B. Mullett C. Lee
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STUDY COMPLIANCE AND CERTIFICATION
The described study was conducted in compliance with the Good Laboratory Practice regulations as set forth in the Code of Federal Regulations (21 CFR 58, 40 CFR 792, and 40 CFR 160); the Organization for Economic Cooperation and Development Principles of Good Laboratory Practice C(81)30 (Final) Annex 2, issued 1979-1980 (effective 1981). To the best of the signers' knowledge, there were no significant deviations from the aforementioned regulations or the signed protocol that would affect the integrity of the study or the interpretation of the test results. The raw data have been reviewed by the Study Director, who certifies that the evaluation of the test article as presented herein represents an appropriate conclusion within the context of the study design and evaluation criteria.
All test and control results in this report are supported by an experimental data record and this record has been reviewed by the Study Director. All raw data, documentation, records, protocols, and a copy of the final report generated as a result of this study will be archived in the storage facilities of Hazleton Washington, Inc., for at least one year following submission of the final report to the Sponsor. After the one year period, the Sponsor may elect to have the aforementioned materials retained in the storage facilities of Hazleton Washington, Inc., for an additional period of time, or sent to a storage facility designated by the Sponsor.
SUBMITTED BY:
Research Associate Study Director:
Hemalatha Murli, Ph.D. Mammalian Cytogenetics Department of Molecular and Cellular Toxicology 15515-0-454
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TABLE OF CONTENTS
Page No.
S U M M A R Y .................................................................
10
I. S P O N S O R ..................
11
II. MATERIAL (TEST ARTICLE) . . . . . ............................... 11 A. Client's Identification B. Dates Received C. Physical Description D. Genetics Assay No.
III.
TYPE OF A S S A Y ................................................... 11
IV. PROTOCOL N O ...................................................... 11
V. STUDY D A T E S ..................................................... 11 A. Initiation Date B. Experimental Start Date C. Experimental Termination Date
VI. SUPERVISORY PERSONNEL ........................................... 11 A. Study Director B. Laboratory Supervisor
VII. O B J E C T I V E ....................................................... 11
VIII. M A T E R I A L S ....................................................... 12
IX.
SOLUBILITY AND S T A B I L I T Y ......................................
12
X. DOSE SELECTION S T U D Y ........................................... 13 A. Dose Selection B. Dosing Information C. Results and Interpretation D. Conclusion
XI. MICRONUCLEUS STUDY ............................................. 15 A. Dose Selection B. Micronucleus Assay Dosing Information
XII.
BONE MARROW HARVEST, SLIDE PREPARATION AND ANALYSIS ............ 16
XIII.
EVALUATION CRITERIA ............................................. A. General B. Data Presentation and Interpretation
17
XIV. RESULTS AND INTERPRETATION ..................................... 18
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TABLE OF CONTENTS (Continued)
XV. C O N C L U S I O N ..................................................... XVI. R E F E R E N C E S ..................................................... XVII. DEVIATION FROMTHESIGNED P R O T O C O L .............................. XVIII. EXPERIMENT DATATABLES ...........................................
18 19 19 20
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SUMMARY
Mutagenicity Test on T-5711 in an in vivo Rat Micronucleus Assay
The objective of this in vivo assay was to evaluate the ability of the test article, T-5711, to induce micronuclei in bone marrow polychromatic erythro cytes of Sprague-Dawley rats. The test article was suspended in 0.52 carboxymethylcellulose (high viscosity).
For the dose selection study, 3 males and 3 females per dose level were dosed by oral gavage at 500, 1625, 2750, 3875, and 5000 mg/kg. Mortality was observed with 1 male at 5000 mg/kg and 1 female at 3875 mg/kg.
Based upon these results, rats were dosed for the micronucleus assay by oral gavage at 1250, 2500, and 5000 mg/kg. Ten animals (five males and five females) were randomly assigned to each dose/harvest time group. Vehicle and positive control groups euthanatized approximately 24 hours after dosing were included in the assay. The animals were dosed with the test article and were euthanatized approximately 24, 48 and 72 hours after dosing for extraction of the bone marrow.
The test material, T-5711, did not induce a significant increase in micronuclei in bone marrow polychromatic erythrocytes under the conditions of this assay and is considered negative in the rat bone marrow micronucleus test.
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Mutagenicity Test on T-5711 in an in vivo Micronucleus Assay
I- SPONSOR: 3M Corporation
II. MATERIAL (TEST ARTICLE): A. Client's Identification: L-1276 (T-5711) B. Dates Received: February 24, 1993; March 12, 1993 C. Physical Description: Cream-colored granular material D. Genetics Assay No.: 15515
III. TYPE OF ASSAY: In Vivo Rat Micronucleus Assay
IV. PROTOCOL NO.: 454, Edition 5
V. STUDY DATES: A. Initiation Date: February 24, 1993 B. Experimental Start Date: March 2, 1993 C. Experimental Termination Date: March 23, 1993
VI. SUPERVISORY PERSONNEL: A. Study Director: Hemalatha Murli, Ph.D. B. Laboratory Supervisor: Jos Arriaga, B.S.
VII. OBJECTIVE: The objective of this in vivo assay was to evaluate the ability of the test article, T-5711, to induce micronuclei in bone marrow polychromatic erythrocytes of Sprague-Dawley rats. This study was conducted using modifications of the procedures suggested by Heddle et al. (1983).
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VIII. MATERIALS:
Adult male and female rats, strain Sprague-Dawley, were purchased from Charles River Laboratories, Raleigh, NC. This healthy, random bred strain was selected to maximize genetic heterogeneity and at the same time assure access to a common source.
Animals were isolated by sex. Animals were housed two per cage during quarantine, and housed individually at randomization. The temperature and humidity were maintained at 74.1 to 80.4F and 5020Z, respectively for the dose selection study and at 726 F and 50202, respectively for the micronucleus study. A 12-hour light/12-hour dark cycle was maintained. A commercial diet (Purina*' Certified Laboratory Chow*' #5002) and water were available ad_ libitum for the duration of the study. The feed was analyzed by the manufacturer for concentrations of specified heavy metals, aflatoxin, chlorinated hydrocarbons, organophosphates, and specified nutrients. The water was analyzed on a retrospective basis for specified microorganisms, pesticides, alkalinity, heavy metals, and halogens. Sanitary, stainless steel, hanging wire cages were used. Personnel handling animals or working within the animal facilities were required to wear suitable protective garments and equipment.
Animals were quarantined for seven days before being placed on study. Animals were randomly assigned to study groups and were individually weighed prior to dosing. All animals were dosed based upon the individual body weights. Animals were uniquely identified by ear tag. Dose or treatment groups were identified by cage card.
At the termination of the study all surviving animals were euthanatized by C02 inhalation, followed by penetration of the thorax. Any extra animals not used for the study were reassigned for personnel training purposes .
IX. SOLUBILITY AND STABILITY:
The test article, T-5711, was supplied as a cream-colored granular material. The solubility of the test article was evaluated for the dose range finding assay. In that study, solubility was evaluated in corn oil and 0.52 high viscosity carboxymethylcellu-lose (CMC). Uneven and unsuitable suspensions were obtained in corn oil. An opaque, slightly viscous suspension was obtained when 0.48 ml of CMC was added to 594.5 mg of T-5711, resulting in a final volume of about 1.2 ml, and a final concentration of about 495.4 mg/ml. This suspension was homogenized in a Tissuemizerft for about 30 seconds, resulting in a more uniform suspension that passed easily through an 18G gavage needle. Thus, the vehicle used to solubilize the test article for the bone marrow micronucleus assay was CMC. The stability of the test article
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under the preparation and dosing conditions of the assay is the respon sibility of the sponsor.
X. DOSE SELECTION STUDY
A. Dose Selection:
No toxicity information was available on T-5711 and dose levels of 500, 1625, 2750, 3875, and 5000 mg/kg body weight were administered by oral gavage for a dose selection study.
B. Dosing Information:
The animals used in the dose selection assay were dosed on Tuesday, March 2, 1993. The weight range of the animals used in the dose range finding assay was 278.6 - 319.8 grams and 199.8 244.9 grams for the males and females, respectively. Dosing suspensions were prepared just prior to dosing and were prepared by making a 500 mg/ml stock for the high dose (5000 mg/kg). This was prepared by adding 41.4 ml of CMC to 30.0012 g of T-5711, resulting in a final volume of 60.0 ml and a final concentration of 500 mg/ml. This opaque, cream-colored suspension was mixed for about 2 minutes in a Tissuemizer to ensure homogeneity. Dilutions of this stock were prepared for the 3875, 2750, 1625, and 500 mg/kg dose levels.
Dosing was achieved using a 10 ml/kg dosing volume. All animals were about 9 weeks old at the time of dosing. An outline of the dosing scheme is found in the following table.
A total of 30 animals was used in this assay.
DOSE GROUPS
TREATMENT
M
F
T-5711
500 mg/kg
33
1625 mg/kg
33
2750 mg/kg
33
3875 mg/kg
33
5000 mg/kg
33
All doses given are on an acute (one-time only) basis. Animals and were =9 weeks old at the time of dosing.
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C. Results and Interpretation:
All animals were examined after dosing and daily throughout the duration of the study (three days) for toxic effects and/or mortalities.
No toxic effects were noted in any of the animals observed immed iately and about 3 hours after dosing.
Approximately 21.5 hours after dosing, 1 male (#6160) from the 5000 mg/kg dose group was experiencing convulsions and lacrimation of the eyes, and appeared languid. All other animals appeared normal and healthy at this time.
Approximately 47 hours after dosing, this male (#6160) from the 5000 mg/kg dose group was found dead. All other animals appeared normal and healthy at this time.
Approximately 69 hours after dosing, 1 female (#6184) from the 3875 mg/kg dose group was found dead. All other animals appeared normal and healthy at this time and remained so until the end of the observation period. The mortality data for this assay are summarized in the following table:
Summary of Mortalities Within 3 Days in Rats Dosed Acutely with T-5711
Observations
_____ Treatment_____________ Male______________ Female
500 mg/kg
0/3 0/3
1625 mg/kg
0/3 0/3
2750 mg/kg
0/3 0/3
3875 mg/kg
0/3 1/3
5000 mg/kg
1/3 0/3
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D. Conclusion:
Based upon the mortality and toxic signs in the animals in this study the maximum tolerated dose (MTD) was estimated to be about 5000 mg/kg. The results of this range finding assay were sufficient to select doses for a rat micronucleus assay.
XI. MICRONUCLEUS STUDY:
A. Dose Selection:
The dose levels used in this assay were based on the dose selection study and animals were dosed at 1250, 2500, and 5000 mg/kg body weight, administered by oral gavage.
B. Micronucleus Assay Dosing Information:
The animals used in the micronucleus assay were dosed on Tuesday, March 16, 1993. Cyclophosphamide (CP, Sigma, Lot #70H0948), the positive control, was solubilized in sterile deionized water (Lot#13, prepared at HWA) and was administered by oral gavage at 60 mg/kg. The vehicle control consisted of CMC (Sigma, Lot#121F0544, prepared on 1/20/1993; expiration date 1/20/1994) and was administered concurrently with the test article at a volume of 10 ml/kg. The weight range of the animals used in the micro nucleus assay was 236.1 - 287.3 grams and 175.5 - 274.4 grams for the males and females, respectively. The dosing suspensions for the assay were prepared by making a 500 mg/ml stock for the high dose (5000 mg/kg). This was prepared by adding 133.5 ml of CMC to 90.0002g of T-5711, resulting in a final volume of 180 ml and a final concentration of 500 mg/ml. This opaque, cream-colored suspension was mixed for about 5 minutes in a Tissuemizer to ensure homogeneity. Dilutions of this stock were prepared for the 2500 and 1250 mg/kg dose levels. A second group of animals (designated Secondary Dose Group) was also assigned to the study and was dosed with the high dose of the test article. These animals were only used in the assay as replacements for any which died in the primary dose group.
The test article dosed animals were euthanatized approximately 24, 48 and 72 hours after administration of the test article. The positive and vehicle control animals were euthanatized approximately 24 hours after the administration of the control articles. An outline of the dosing scheme is found in the following table:
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Dosing Scheme for Micronucleus Assay
A total of 120 animals was used in this assay.
Number of Animals Assigned
Primary Dose Groups Secondary Dose
Groups1
24 Hr 48 Hr
72 Hr
Treatment
MF
MF
M F Male Female
T-5711 1250 mg/kg
2500 mg/kg
5000 mg/kg
Vehicle Control, 0.52 high viscosity carboxymethylcellulose
10 ml/kg
55
-
-
Positive Control, Cyclophosphamide
60 mg/kg
55
-
__
a The animals assigned to the secondary dose groups were dosed and were only used to replace animals which died in the primary dose group at the high dose level. All extra animals not used as replacements were euthanatized at the completion of the trial.
The age of the animals at the time of dosing was "8 weeks.
Volumes dosed were 10 ml/kg and were based upon individual animal weights.
XII. BONE MARROW HARVEST, SLIDE PREPARATION AND ANALYSIS:
At the appropriate harvest time, the animals were euthanatized with C02 and the adhering soft tissue and epiphyses of both tibiae were removed. The marrow was aspirated from the bone and mixed in a syringe with -0.1 ml fetal calf serum to form a suspension. The cells were then placed on slides and air-dried, fixed in methanol, and stained in May-Grunwald solution followed by Giemsa (Schmid, 1975). The air-dried slides were coverslipped using Depex mounting medium.
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The coded slides were then scored for micronuclei and the polychromatic (PCE) to normochromatic (NCE) cell ratio. Standard forms were used to record these data. One thousand PCEs per animal were scored. The fre quency of micronucleated cells was expressed as percent micronucleated cells based on the total PCEs present in the scored optic field. The normal frequency of micronuclei in this rat strain is about 0.0-0.42.
The frequency of PCEs versus NCEs was determined by scoring the number of PCEs and NCEs observed in the optic fields while scoring the first 1000 erythrocytes.
XIII. EVALUATION CRITERIA:
A. General:
The criteria for the identification of micronuclei were those of Schmid (1976). Micronuclei were darkly stained and generally round, although almond and ring-shaped micronuclei occasionally occur. Micronuclei had sharp borders and were generally between 1/20 and 1/5 the size of the PCE. The unit of scoring was the micronucleated cell, not the micronucleus; thus the occasional cell with more than one micronucleus was counted as one micronucleated PCE, not two (or more) micronuclei. The staining procedure permitted the differentiation by color of PCEs and NCEs (bluish-grey and red, respectively).
B. Data Presentation and Interpretation
Data are summarized by sex and dose groups for the different time points. Individual animal data are also presented. The analysis of the data was performed using an Analysis of Variance on the square root arcsine transformation which was performed on the proportion of cells with micronuclei per animal (square root arcsine proportion). Once the Analysis of Variance had been performed, Tukey's Studentized range test (HSD) with adjustment for multiple comparisons (Sokal and Rohlf, 1981) was used at each harvest time to determine which dose groups, if any, were significantly different (p<0.05) from the vehicle control. Analyses were performed separately for each harvest time and sex combination, and also at each harvest time for the sexes combined.
The criteria for determining a positive response involved a statistically significant dose-related increase in micronucleated PCEs, or the detection of a reproducible and statistically significant positive response for at least one dose level. A test
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article that induced neither a statistically significant dose response nor a statistically significant and reproducible increase at one dose level was considered negative. In either case, the final decision was based on scientific judgment.
XIV. RESULTS AND INTERPRETATION:
All animals were observed immediately after dosing and periodically throughout the duration of the assay for toxic symptoms and/or mortalities. All animals in the vehicle and positive control groups appeared normal after dosing and remained healthy until the appropriate harvest times. All test article dosed groups appeared normal immediately after dosing, and approximately 19 and 23 hours after dosing.
Approximately 47 hours after dosing, 1 male (#6333) from the secondary dose group and 1 female (#6387) from the 2500 mg/kg and 48 hour harvest group were found dead. All remaining animals from 5000 mg/kg dose group appeared languid. All animals in the 1250 mg/kg dose group and all surviving animals in the 2500 mg/kg dose group appeared normal and healthy at this time.
Approximately 71.5 hours after dosing, 2 males (#'s6314, 6379) and 1 female (#6360) from the 5000 mg/kg and 72 hour harvest group, and 1 male (#6421) and 1 female (#6386) from the secondary dose group were found dead. All remaining animals from the 5000 mg/kg dose group and the secondary dose group appeared languid. All animals from the 1250 and 2500 mg/kg dose groups appeared normal and healthy at this time.
The test article, T-5711, induced no significant increases in micronucleated polychromatic erythrocytes over the levels observed in the vehicle controls in either sex or at any of the harvest times. Possibly due to toxicity, a statistically significant reduction in the PCE/NCE ratio was observed in the males from the positive control group. The positive control, CP, induced significant increases in micronucleated PCEs in both sexes, with means and standard errors of 2.242 0.462 and 2.222 0.322 for the males and females, respectively. The data summarized by dose group are presented in Table 1 and individual animal data are found in Tables 2 through 4.
XV. CONCLUSION:
The test material, T-5711, did not induce a significant increase in micronuclei in bone marrow polychromatic erythrocytes under the conditions of this assay and is considered negative in the rat bone marrow micronucleus test.
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XVI. REFERENCES:
Heddle, J.A., Hite, M . , Kirkhart, B., Larsen, K., MacGregor, J.T., Newell, G.W., and Salamone, M.F.: The induction of micronuclei as a measure of genotoxicity. Mutation Res., 123:61-118. 1983.
Schmid, W. : The micronucleus test. Mutation Res., _31_:9-15, 1975.
Schmid, W . : The micronucleus test for cytogenetic analysis. In, Chemical Mutagens: Principles and Methods for Their Detection. Vol. 4 (A. Hollaender, ed.). Plenum, pp. 31-53, 1976.
Sokal, R.R. and Rohlf, J.J.: Biometry. Freeman, 1981.
XVII. DEVIATION FROM THE SIGNED PROTOCOL:
The following deviation was made from the protocol.
The temperature was maintained at 74.1 to 80.4F for the dose selection study and not maintained at 726F. This was due to technical difficulties at the animal facility. This slight deviation did not affect the animals in any way.
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XVIII.
EXPERIMENT DATA TABLES
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SPONSOR: 3M Corporation
ASSAY: 15515
TABLE 1 MICRONUCLEUS DATA SUMMARY TABLE
TEST ARTICLE: T-5711
O O A.
TREATMENT
DOSE
VEHICLE CONTROL 10 ml/kg 0.52 CARBOXMEIHYLCELLLOSE
POSITIVE CONTROL 60 mg/kg CYCLOPHOSPHAMIDE
TEST ARTICLE T-5711
1250 mg/kg
HARVEST TIME (HR)
24
24
24 48
2 MICRONUCLEATED PCEs MEAN OF 1000 PER ANIMAL S.E.
MALES
FEMALES
TOTAL
0.12 0.05
0.02 0.02
0.07 0.03
2.24 + 0.46*
2.22 0.33*
2.23 0.27
0.04 0.02 0.10 0.04
0.16 0.06* 0.12 + 0.04
0.10 0.04 0.11 0.03
Ji11111I111111111l .i11111111111111
RATIO PCE:NCE MEAN S.E.
MALES
FEMALES
0.66 0.04
0.58 0.13
0.34 0.07*
0.51 0.13
0.84 0.19 0.63 0.04
0.40 0.02 0.54 0.09
en
2500 ng/kg
72 0.06 0.04
24 0.14 0.04 48 0.10 0.04 72 0.08 0.04
24 0.10 0.05
0.10 0.03
0.14 0.02* 0.08 0.03 0.08 0.04
0.08 0.02
0.08 0.02
0.14 0.02 0.09 0.03 0.08 0.02
0.09 0.03
\t111111!11111)1111111
0.46 0.05
0.63 0.09 0.79 0.15 0.49 0.11
0.82 0.10
0.43 0.16
0.52 0.14 0.47 0.11 0.53 0.13
0.79 0.10
5000 mg/kg
48 0.16 0.02 72 0.12 0.04
0.08 0.04 0.12 0.05
0.12 0.02 0.12 0.03
i111111
0.63 0.14 0.74 0.19
0.52 0.16 0.39 0.11
* Significantly different from the corresponding vehicle control, p<0.05.
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TABLE 2
MICRONUCLEUS TEST - INDIVIDUAL ANIMAL DATA
SPONSOR: 3M Corporation
TEST ARTICLE: T-5711
TREATMENT
Vehicle Control (24 hour harvest)
Positive Control (24 hour harvest)
Test Article (24 hour harvest)
1250 mg/kg
2500 mg/kg
5000 mg/kg
ANIMAL NUMBER
6357 6367 6376 6438 6442
6312 6375 6396 6419 6432
6324 6335 6363 6406 6408
6321 6337 6384 6431 6439
6332 6343 6372 6418 6424
MALES
NO. MN PCEs (1000)
3 0 1 1 1
23 18 16 15 40
1 1 0 0 0
2 2 1 2 0
0 1 0 1 3
RATIO
11 11 11 1
PCE:NCE I 1 11
0.61 1
0.69 1
0.63 1
0.56 i
0.80 1
1 0.37 1
0.60 i
0.33 i
0.17 i
0.25 1 11
0.82 i
0.37 i
0.54 !
1.04 1
1.43 1 1I
0.31 1
0.82 J
0.67 1
0.60 1
0.77 1 11
1.07 1
0.52 \
0.82 1 0.66 \
1.02 1
FEMALES
ANIMAL NUMBER
NO. MN PCEs RATIO (1000) PCE:NCE
6317 6355 6390 6407 6434
6318 6346 6359 6373 6415
6322 6351 6364 6399 6410
6347 6378 6397 6402 6444
6330 6331 6349 6382 6420
0 0 0 4 0
13 30 16 25 27
1 3 0 1 3
2 1 2 1 1
1 1 1 1 0
0.95 0.51 0.72 0.15 0.55
0.35 0.92 0.37 0.72 0.20
0.41 0.32 0.46 0.37 0.43
0.33 0.72 0.63 0.84 0.08
0.73 0.61 0.70 1.19 0.71
MN = Micronucleus PCE = Polychromatic erythrocyte No. MN PCEs = Micronucleated PCEs NCE = Normochromatic erythrocyte
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TABLE 3
MICRONUCLEUS TEST - INDIVIDUAL ANIMAL DATA
SPONSOR: 3M Corporation
TEST ARTICLE: T-5711
ASSAY NO.: 15515 TREATMENT
Test Article (48 hour harvest)
1250 mg/kg
2500 mg/kg
5000 mg/kg
ANIMAL NUMBER
6325 6427 6428 6443 6447
6319 6326 6327 6380 6401
6329 6348 6377 6413 6422
MALES
NO. MN PCEs (1000)
0 2 2 1 0
0 0 2 1 2
1 2 2 2 1
11 11 11 RATIO 1 PCE:NCE ! i1 11 0.59
0.79 1
0.60 1
0.58 1
0.60 1
0.39 1 0.54 1
1.10 1
1.11 I 0.80 1
0.44 j
0.93 !
0.19 i
0.89 1
0.69 1
FEMALES
ANIMAL NUMBER
NO. MN PCEs RATIO (1000) PCE:NCE
6328 2 0.43 6374 0 o.ee 6394 1 0.39 6426 2 0.46 6430 1 0.55
6313 6338 6352 6362 6387*
1 1 0 1
0.38 0.45 0.25 0.78
6341 1 0.25 6358 0 0.35 6361 2 1.07 6412 1 0.27 6414 0 0.64
MN = Micronucleus PCE = Polychromatic erythrocyte No. MN PCEs = Micronucleated PCEs NCE = Normochromatic erythrocyte
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TABLE 4
MICRONUCLEUS TEST - INDIVIDUAL ANIMAL DATA
SPONSOR: 3M Corporation
TEST ARTICLE: T-5711
ASSAY NO.: 15515 TREATMENT
Test Article (72 hour harvest)
1250 mg/kg
2500 mg/kg
5000 mg/kg
ANIMAL NUMBER
6354 6370 6425 6429 6441
6320 6398 6404 6417 6437
6342 6383 6391 6392 6446
MALES
NO. MN PCEs (1000)
0 2 0 0 1
0 2 1 0 1
2 1 2 0 1
RATIO
11 11 11 1
PCE:NCE i ii
0.45
0.46 1
0.63
0.43 1
0.32 ii 11
0.57
0.25
0.20 1
0.72 1
0.69 ii ii
0.20
0.90
1.29
0.81 1
0.48 1
FEMALES
ANIMAL NUMBER
NO. MN PCEs RATIO (1000) PCE:NCE
6345 0 0.46 6350 1 0.13 6393 1 0.36 6433 2 0.15 6435 1 1.04
6334 2 0.30 6366 0 0.97 6403 0 0.33 6405 1 0.36 6445 1 0.71
6315 3 0.53 6323 1 0.16 6385 1 0.16 6411 1 0.33 6436 0 0.75
MN = Micronucleus PCE = Polychromatic erythrocyte No. MN PCEs = Micronucleated PCEs NCE = Normochromatic erythrocyte
15515-0-454
004454
24
HAZLETON
WASHINGTON
HWA STUDY NO. __ PROTOCOL NO. 454 EDITION 5
IN VIVO EAT MICRONUCLEUS ASSAY
Hazleton Washington, Inc. (HWA) will conduct this study in compliance with' EPA and FDA Good Laboratory Practice (GLP) Guidelines. This protocol, critical phases of the work in progress and the final report will be subject to audit by Quality Assurance in accordance with SOPs at Hazleton Washington, Inc. The study will be conducted by HWA at 9200 Leesburg Pike, Vienna, Virginia 22182.
PART 1. SPONSOR INFORMATION AND APPROVALS
I. SPONSOR IDENTIFICATION
Company Name : _______
Address: ____________
II. TEST ARTICLE IDENTIFICATION:
H I . TEST ARTICLE ANALYSIS
Determination of the test article stability and the test article characteristics as defined in the GLP regulations of FDA (21 CFR 58.105), EPA-TSCA (40 CFR 792.105), and EPA-FIFRA (40 CFR 160.105) is the responsibility of the Sponsor.
IV. NOTIFICATION OF REGULATORY SUBMISSION
In order to comply with U.S. federal regulation codes (FDA, 21 CFR 58.10; EPA-TSCA, 40 CFR 792.10; EPA-FIFRA, 40 CFR 160.10) and certain foreign agencies, consulting laboratories must be notified if all or part of a study is to be submitted to the agency. HWA maintains a master schedule of studies which fall under regulatory review. Please indicate which agency, if any, might receive the results of this study:
Undetermined FDA EPA-TSCA
MAFF
MOHW
OECD
OTHER
EPA-FIFRA
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v. STUDY DATES
Proposed Experimental Start Date: Proposed Experimental Termination Date:
VI. APPROVAL OF STUDY PROTOCOL Study Director: _________________________ Hemalatha Murli, Ph.D. Sponsor: ____ ______________________________
PROTOCOL NO. 454 EDITION 5
Date: Date:
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PART 2 - STUDY PROTOCOL
IN VIVO RAT MICRONUCLEUS ASSAY
I. OBJECTIVE
The objective of this study is to evaluate a test article for clastogenic activity and disruption of the mitotic apparatus in polychromatic erythrocyte stem cells in rat bone marrow in vivo.
II. DEFINITIONS
Micronucleus: a small chromatin body, consisting of entire chromosome(s) and/or of acentric chromosome fragment(s), which lags behind at mitotic anaphase. After telophase, these chromosome(s) and fragment(s) may not be included in the daughter nuclei, and may form single or multiple micronuclei in the cytoplasm.
III. RATIONALE
The micronucleus test can serve as a rapid screen for clastogenic agents and test articles which interfere with normal mitotic cell division (Schmid, 1975; Heddle et al., 1983). Micronuclei are formed from chromosomes or chromosome fragments left behind during anaphase and can be scored during interphase because they persist (Schmid, 1975). In this assay, polychromatic erythrocytes (PCEs) in the bone marrow are scored for the presence of micronuclei. During maturation from erythroblast to erythrocyte the nucleus is extruded, while micronuclei, if present, remain in the cytoplasm. Detection of micronuclei in non-nucleated cells is thus facilitated, and time involved in searching for metaphase spreads in treated cell populations is eliminated. Test articles affecting spindle-fiber function or formation as well as clastogenic agents can be detected through micronucleus induction (Schmid, 1975).
IV. MATERIALS
A. Animals
Young adult male and female rats of the Sprague-Dawley strain, 8-10 weeks old at the time of dosing, will be purchased from Charles River Laboratories, Inc., or
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Harlan Sprague-Dawley, Inc. This strain has been selected to maximize genetic heterogeneity and at the same time ensure access to a common source.
B. Control Articles
Cyclophosphamide (CP, 60 mg/kg) will be used as the positive control,article and will be administered by oral gavage. The vehicle control article will consist of the solvent or vehicle used for the test article and will be administered by the same route as, and concurrently with, the test article and in amounts equal to the maximum volumes administered to the experimental animals. The maximum dosing volume will not exceed 20 ml/kg. The vehicles generally used in the assay are water, 0.9% saline, 0.5% aqueous carboxymethylcellulose solution, or corn oil. Other vehicles may be requested by the sponsor.
V. EXPERIMENTAL DESIGN
A. Animal Husbandry
Animals will be isolated by sex. Animals will be housed two per cage during quarantine, but will be housed singly prior to experiment initiation. Animals are housed under the following climatic conditions: temperature, 72 6*F; humidity, 50% 20%; light cycle, 12 hours light/dark. A commercial diet (Purina Certified Laboratory Chow #5002) and tap water will be available ad libitum unless contraindicated by the particular experimental design. The feed is analyzed by the manufacturer for concentrations of specified heavy metals, aflatoxin, chlorinated hydrocarbons, organophosphates, and specified nutrients. The water is analyzed biannually on a retrospective basis for specified microorganisms, pesticides, heavy metals, alkalinity, and halogens. Animals will be quarantined for at least 7 days before being placed on study.
Animals will be assigned to study groups at random according to Hazleton Standard Operating Procedures. Animals will be weighed prior to dosing. They will be dosed based upon the individual animal weights. Animals will be uniquely identified by ear tag. Treatment groups will be identified by cage label.
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Sanitary cages and bedding will be used. Personnel handling animals or working within the animal facilities will be required to wear suitable protective garments and equipment.
B . Dose Selection
The high dose generally will be selected as 80% of the maximum tolerated dose. The high dose should produce some indication of toxicity (e.g., death, depression of ratio of PCEs to normochromatic erythrocytes (NCEs). One-half and one-quarter of this high dose will normally be used as the intermediate and low dose levels, respectively. Use of a high dose increases the likelihood that a weak clastogen will be detected, and is therefore recommended.
If no appropriate range finding data are available, a range finding study can be performed.
DOSE RANGEFINDING STUDY
The dose-rangefinding study will be conducted using five treatment groups. Each of the five groups will consist of 3 male and 3 female rats.
Group Designation and Treatment Regimens
Grout No.
Number of Rats Male Female
Route
Duration (Davs)
1 3 3 PO 3
2 3 3 PO 3
3 3 3 PO 3
4 3 3 PO 3
5 3 3 PO 3
The route of administration will be oral gavage. In the event that test article characteristics preclude oral gavage, IP injection will be employed. These routes of administration have
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been selected because they are the most common routes of administration for this test procedure. Other routes of administration may be used as indicated by scientific evidence. The test material will generally be solubilized in one of the following solvents: water, 0.9% saline, 0.5% aqueous carboxymethylcellulose solution, or corn oil. Other vehicles may be requested by the sponsor. The dosing volume will not exceed 20 ml/kg. All animals will be dosed based upon individual body weights. Dose levels will be assigned by a protocol amendment
Body weights will be taken prior to dosing. Dosing formulation will be prepared just prior to dosing. Dosing solutions will be prepared and held at ambient temperatures until dosing (approximately 1-2 hours). All animals will be euthanized 3 days after receiving a single dose.
Daily observations for toxic signs and mortality for the duration of the study. Animals will be euthanized by C02 inhalation followed by penetration of the thorax.
The daily observations toxic symptoms and/or mortalities data will be used to estimate the Maximum Tolerated Dose (MTD). Doses will then be assigned for the subsequent cytogenetics assay.
MICRONUCLEUS STUDY
C. Dosing Schedule and Route of Administration
Normally an acute dosing regimen (single administration) will be used (see Table below). Harvest will be approximately 24, 48, 72 hours after administration of the test article, and at approximately 24 hours after administration of the control articles. A total of 110 animals will be used. Equal numbers of males and females will be used at each treatment group. An additional group of animals consisting of at least five males and five females may be dosed as a secondary dose group with the high dose of the test material. This group will be dosed if toxicity is expected at the high dose and the animals in this group will only be used as replacements for any which die prior to euthanasia. The use of the secondary dose group will be determined by the study director. Freshly prepared solutions will be employed.
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NUMBER OF ANIMALS USED FOR MICRONUCLEUS ASSAY
Treatment
Harvest Times After Treatment (Males and Females)
24 Hours 48 Hours 72 Hours
Total
Negative Control Positive Control Low Dose Medium Dose High Dose
5+ 5 5+ 5 5+ 5 5+ 5 5+ 5
--
--
5+ 5 5+ 5 5+ 5
...
--
5+ 5 5+ 5 5+ 5
5+ 5 5+ 5 15 + 15 15 + 15 15 + 15
TOTAL
25 + 25 15 + 15 15 + 15
55 + 55
The route of administration will be oral gavage. In the event that test article characteristics preclude oral gavage, IP injection will be employed. These routes of administration have been selected because they are the most common routes of administration for this test procedure. Other routes of administration may be used as indicated by scientific evidence.
D. Extraction of Bone Marrow and Preparation of Slides
Animals will be killed with C02, followed by penetration of the thorax, and hind limb bones will be removed for marrow extraction. The marrow will be flushed from the bone and transferred to centrifuge tubes containing 3 ml fetal calf serum (one tube for each animal). Following centrifugation to pellet the tissue, some of the supernatant will be drawn off, the cells resuspended, and the suspension spread on slides and air-dried.
The slides will then be fixed in methanol, stained in acridine orange, and analyzed under fluorescent microscopy. For control of bias, all slides are coded for analysis.
E. Scoring the Slides
An attempt will be made to score one-thousand PCEs per animal. The frequency of micronucleated cells will be expressed as percent micronucleated cells based on the total PCEs percent. The normal background frequency of micronuclei in the rat strain is around 0.0-0.4%.
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The frequency of PCEs versus mature erythrocytes (NCEs) will be determined by scoring the number of PCEs and NCEs observed in the optic fields while scoring the first 1000 erythrocytes on the slide.
VI. DATA
The criteria for the identification of micronuclei are those of Schmid (1976). Micronuclei are bright yellow, usually round bodies, with sharp borders and are generally between 1/20 and 1/5 the size of the PCE, which will stain bright orange. The unit of scoring is the micronucleated cell, not the micronucleus; thus the occasional cell with more than one micronucleus is counted as one micronucleated PCE, not two (or more) micronuclei.
The staining procedure permits the differentiation by color of polychromatic and normochromatic erythrocytes (bright orange and ghost-like, dark green respectively).
Data Presentation
The data reported will include the number of PCEs scored, the number of micronucleated PCEs, the percentage of micronucleated PCEs, and the ratio of polychromatic to normochromatic erythrocytes for each experimental animal.
Evaluation Criteria
The criteria for a positive response is a statistically significant dose-related increase in micronucleated PCEs, or the detection of a reproducible and statistically significant positive response for at least one dose level. A test article that induces neither a statistically significant dose response nor a statistically significant and reproducible increase at one dose level is considered negative. In either case, the final decision is based upon scientific judgement.
VII. TEST INTERPRETATION
The analysis of this data will be performed using an analysis of variance on the arcsine transformations of the proportion of cells with micronuclei per animal. If the analysis of variance is significant (p<0.05), a t test with multiple comparisons (Sokal and Rohlf, 1981) will be used to determine which dose groups, if any are significantly different from the negative control. Analyses are performed separately for each harvest time and sex combination.
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VIII. REFERENCES
1. Heddle, J.A., Hite, M . , Kirkhart, B . , Larsen, K . , MacGregor, J.T., Newell, G.W. and Salamone, M.F.: The induction of micronuclei as a measure of genotoxicity. Mutation Res., 123:61-118. 1983.
2. Schmid, W. : The micronucleus test. Mutation Res., 31:9-15, 1975.
3. Schmid, W. : The micronucleus test for cytogenetic analysis. In, Chemical Mutagens: Principles and Methods for Their Detection, Vol. 4 (A. Hollaender, ed.). Plenum, pp. 31-53, 1976.
4. Sokal, R.R. and Rohlf, J.J.: Biometry, Freeman, 1981.
IX. REPORT FORMAT
HWA employs a standard report format for each assay design. Reports will be issued individually by type of test and by test article. Each final report will provide the following information.
Sponsor identification. Quality Assurance statement. Statement of GLP Compliance. Signatures of study director and senior
lab technician. Test article identification and HWA Study
Number. A physical description of the test article and date of receipt will be included in this section. Type of assay and protocol number. Dates of study initiation and completion. Study director and senior technician. Methods. Evaluation criteria. Interpretation of results. Conclusions. References. Test results presented in tabular form.
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X. CHANGES OR REVISIONS
Any changes or revisions of this approved protocol will be documented, signed by the Study Director, dated, and maintained with this protocol. The Sponsor will be notified of any change or revision.
XI. RECORDS TO BE MAINTAINED
All raw data, documentation, records, protocols, and final reports generated as a result of this study will be archived in the storage facilities of Hazleton for at least one year following submission of the final report to the sponsor. After the one year period, the sponsor may elect to have the aforementioned materials retained in the storage facilities of Hazleton for an additional period of time or sent to a storage facility designated by the sponsor.
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3M Internal Correspondence
cc:
To: From: Subject: Date:
R. G. Perkins - 220-2E-10
B. C. Copley - 53-3S-02 R. D. Howells - 53-3S-02 Key to FC Alcohol Tox Samples September 14,1995
T5877 .T5710 T5711 T5794 T5795 T5878
Wide Range EtFOSE FM 3924 Lot 547 Retain from 2 year feeding study
Narrow Range EtFOSE Lot 884
Typical Raw Material for FC-807
Wide Range MeFOSE Lot 555 Typical Raw Material for FX-845
Narrow Range MeFOSE Notebook 97900-107-2 Lab Prepared Sample
Wide Range EtFOSE Notebook 97900-112-2 Lab Prepared Sample
Wide Range MeFOSE Lab Prepared from Washed POSF
Analytical Request 41220 L-13203 Analytical Request 41220 L-10059
Analytical Request 41220 L-1276
Analytical Request 41343 L-13097 Analytical Request 41343 L-13098 Analytical Request 42607
RDH/j Attachments
00446s
REQ 4122 0
R. H ow ells
GC/MS analyses of these samples were accomplished using a 25 m X 0.32 mm HP-1 GC column to introduce the samples into the Finnigan SSQ-70 mass spectrometer. The sample components were ionized using chemical ionization with methane as the reagent gas. The GC column was operated from 40 to 300 C at rate of10 degrees per minute. The results of these analyses combined with their corresponding GC/FID area percents show the following:
Component I.D.
L-10059 N.R. N-EtFOSE Lot
W.R. N-EtFOSE Lot 547
N-Ethyl-carboxamides (Rf-C(0)N(Et)H)
0.22%
1.76 %
N-EtFOS Amide ( C8FnS02N(Et)H )
0.04%
0.13%
C2F5SO2NCEOCH2CH2OH
0.01 %
0.12%
C3F7S02N(Et)CH2CH20H
0.13%
1.17%
C4F9S02N(Et)CH2CH20H
0.11 %
1.52%
C8Fl7S02N(Et)2
0.03%
0.04%
CsFi iS02N(Et)CH2CH20H
0.03%
1.34%
C6Fi3S02N(Et)CH2CH20H
0.51 %
3.52%
C8Fl 7S 0 2 N (Et)CH2CH2Cl
0.08 %
0.16%
C7Fi5S02N(Et)CH2CH20H
0.82%
1.40 %
N-EtFOSE C8F 17SO2NCEOCH2CH2OH
96.09 %
87.16 %
C8Fi5S02N(Et)CH2CH20H
0.78 %
0.50 %
C8Fi7S02N(Et)(CH2CH20)2H
0.17%
C sH i7S 02N (E t)H
0.16%
0.37 %
C8Fi7S02N(Et)CH2CH20C02CH2CH3 (or similar)
0.21 %
0.22%
Other High Boilers
0.28 %
0.59 %
004466
Component I.D.
N-Methyl-carboxamides (Rf-C(0)N (M e)H) C2F5S02N(Me)CH2CH20H C8Fi7S02N(Me)2 C3F7 SO2 N (M e)C H 2C H 20H CsFi7S02N(Me)H C4F9S02N(Me)CH2CH20H C5F 1iS 02N (M e)C H 2C H 20H C6Fi3S02N(Me)CH2CH20H C8Fi7S02N(Me)CH2CH2Cl C7Fi5S02N(Me)CH2CH20H N-MeFOSE C8FnS02N(Me)CH2CH20H C9Fi9S02N(Me)CH2CH20H C8Fi7S02N(Me)(CH2CH20)2H CsHi7S02N(Me)H Other High Boilers
L-1276 N-MeFOSE Lot 1.46% 0.24 % trace
1.15% trace 1.62% 1.34% 5.05% 0.13% 1.69% 83.88 % 0.87 % 0.34 % 0.54% 1.55 %
Further work has been done by GC on these samples which involves derivatization of the alcohols with trifluoroacetic anhydride (TFAA) and again with BSA (to give the trimethylsilyl ethers). This work was designed to investigate the potential problems that could be overlooked by any one method of analysis. Preliminary results show that analyzing the EtFOSE underivatized could hide a significant amount of N-EtFOS Amide under the C-3 alcohol peak in wide range material. However, analyzing the same material that has been derivatized with TFAA shows that any EtFOSE-chloride that is present in the sample is now completely masked by the derivatized C-8 alcohol. The BSA derivative has not been evaluated yet, but similar problems are expected because of the number of different components in the sample. The same sort of problems will most likely exist with MeFOSE and will be even more complicated in the analysis of MeFOSEA.
7/2/93
004467
REQ 41343
J. Grant
GC/MS analyses of these samples were accomplished using a 25 m X 0.32 mm HP-1 GC column to introduce the samples into the Finnigan SSQ-70 mass spectrometer. The sample components were ionized using chemical ionization with methane as the reagent gas. The GC column was operated from 40 to 300 C at rate of10 degrees per minute. The results of these analyses combined with their corresponding GC/F1D area percents show the following:
Component I.D.
N-Ethyl-carboxamides (Rf-C(0)N(Et)H) C6Fi3S02N(Et)H C2F5S02N(Et)CH2CH20H C7Fi5SO2N(E0H N-EtFOS Amide ( CsFnSCfeNflEOH) C6Fl3S02N(Et)2 C 3F7 S O2 N (EOCH2 CH2 OH C4 F9 SO2 NCEOCH2 CH2 OH CsFi iS02N(Et)CH2CH20H C6Fi3S02N(Et)CH2CH20H C7Fi5S02N(Et)CH2CH20H N-EtFOSE C8Fi7SC>2N(Et)CH2CH20H
W.R. N-EtFOSE Precut 97900-112-1 68.34 %
1.28% trace trace 0.41 % 1.41 % 1.53% 0.62 % 1.48 % 20.16% 3.52% 1.14%
W.R. N-EtFOSE main cut 97900-112-2
1.27 % 0.32% trace trace trace trace 0.51 % 0.42% 2.16% 60.86 % 22.55 % 11.92%
Component I.D.
N.R. N-MeFOSE B.P. 132 97900-107-2
004468
mw 137 possibly -S02N(Me)CH2CH20C7Fi5S02N(Me)CH2CH20H N-MeFOSE C8FnS02N(Me)CH2CH20H C9Fi9S02N(Me)CH2CH20H C8Fi7S02N(Me)(CH2CH20)2H C 8H nS02N (M e)H Other High Boilers
Component I.D.
N-Ethyl-carboxamides (Rf-C(O)NCEt)H) C3F7S02N(Et)H C4F9S02N(Et)H C5FnS02N(Et)H C6Fi3S02N(Et)H C7Fi5S02N(Et)H N-EtFOS Amide ( CsFi7S02N(Et)H) C8Fi5S02N(Et)H numerous other impurities o f most homologs that include hydrides, chlorine in the backbone, and unidentified high boilers
0.58% 0.41 % 98.19% 0.59% trace trace 0.23%
W.R. N-EtFOS Amide 97900-111 10.23 %
trace 0.71 % 3.58 % 52.50 % 20.06% 12.93 % trace
trace
004469
To: From: Subject: Date:
I. Muggli
53-6S-02
R. M. Payfer
236-2B-11 (612)733-4212
SA&C Analytical Request No. 42607
Dec. 21, 1993
GC/MS analysis of this sample was accomplished using a 25 m X 0.32 mm HP-1 GC column to introduce the sample into the Finnigan SSQ-70 mass spectrometer. The sample components were ionized using chemical ionization with methane as the reagent gas. The GC column was operated from 40 to 300 C at a rate of 10 degrees per minute. GC analysis with flame ionization detection was also done, and the area percent values from this work were applied to the peak identities from the mass spec work. The results of these analyses (which are not necessarily quantitative) show the following:
Mol. Weight Component I.D.
L -13202 N-MeFOSE
427 N-Methyl-carboxamides C7Fis-C(0)N(Me)H 0.06 %
527 CaFi7S02N(Me)2
0.12%
513 CsFi7S02N(Me)H
0.25 %
357 C4F9S02N(Me)CH2CH20H
0.03 %
407 C5FnS02N(Me)CH2CH20H
0.52 %
457 C6Fi3S02N(Me)CH2CH20H
3.38 %
507 C7FisS02N(Me)CH2CH20H
2.16%
557 N-MeFOSE CaFi7S02N(Me)CH2CH20H 89.48 %
519 CaFi5S02N(Me)CH2CH20H
0.84 %
607 C9Fi9S02N(Me)CH2CH20H
0.55 %
573 CaFi6CIS02N(Me)CH2CH20H
0.67 %
665 C8Fi6SF5-S02N(Me)CH2CH20H
0.29 %
004470
601 C8Fi7S02N(Me)(CH2CH20)2H Other High Boilers
0.54 % 1.05%
004471