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Inte~i,cal Correspondence
CONFIDENTIAL - LIMITED DISTRIBUTION
To: R. S. Lamar - RfrD Ctr
Dale: August 28, 1973 ~
From: V. E. Wolkodoff - RfrD Ctr
Copies;
Subfect: DETERMINATION OF CBRYSOTILE BY TEM IN COMMERCIAL TALeS
1. Fourteen co_ercial talcs were examined by 1'PJI for the presence of chrysotile. The samples are identified in Table No.. 1, which also list.s individual 'l'BM plate numbers.
2. The presence or absence of chrysotile is based on scanning from 20 to 25 fields for each sample. Three electron micrographs were taken of typical fields in each sample. These electron micrographs, a total of 42 prints. are attached.
3 The results are listed in 'lable No.2. If chrysotile
was detected in a sample, a perc:eDtage is listed. and,
at. best., is qQalit:at.ive. Bowever, t:hese percentages
are relative to each other.. Data on treaoliteor
t.reaollte-like aaphibole are also listed but are based mainly on qQalitative petrographic work as a frame of reference ear future optical work by recent FDA proposal.
4. Results:
A. Chrysotile was not detected in:
Mistron Vapor Mistron Monomix Pfizer Emtal 599 Cyclo-Fil
B. If the chrysotile content was determined to be 1000 ppm or less, the chrysotile at this stage of the study has to be considered a contaminant. These include:
Yellowstone Mistron Super Frost Johnson and Johnson, Vermont Cyclo-Sorb Johnson and Johnson Baby Powder
CAM-266
CRMC-Talc-Micro-001371
'.'.. Page 2 R. S. Lamar
August 28, 1973
c. The only samples which contain chrysotile believed
to be part of the mineralogical .ystam at this atage of the study are:
Fibrene C-400 ABbestine 5X Hytal 300 Italian Cosmetic Talc
s. In many of the electron micrographs I distinctly fibrous
material appears, even though chrysotile and uemolite are not reported. 'lhese "fibers" are talc verified, either during process of scanning or by reviewin9 .,. plates un4er a binocular microscope.
1/- t.. tJJ..tk,uf!
V. E. Wolkodoff
jmw Attachment
ce:
J. M. Sharratt - 2 West
w. L. VanDerbeek - 2 West
P. A. Martinson - 2 West
~./ M. Hutchison - 2 West
A. L. Pundsack - R&D Ctr
S. Speil
w. c. Streib
- R&D Ctr - R&D Ctr
J. P. Leineweber - R&D Ctr
Notebook No. 4393, p. 4,5
CRMC-Talc-Micro-001372
Table 2 Detection of Chrysotile by TEM
in Commercial Tales
No.
Product.
by Volume. ppm
Chtysotile , by Volume
1
2
3
.......
4
Yellowstone Mistron Vapor !tistron Monomix: Mistron Super Prost
500 0 0
<100
COntamination
---
---
COntamination
0
0 0 trace?
5
6
7
"
8
i'.
9
: 10
~.. .
11
Sj'
12 13
14
FibreneC-4-0 Pfiaer
I Asba.t.ine sx
I Nytal 300 Emtal 599 J and J, Vermont
i
Italian cosmetic Cyclo-Pi1 Cyclo-Sorb
1500 0
>3000 >5000
0 <1000
3000 0
approx. 1000
I J and J Baby Powder i approx. 1000
j -1
,_ _~iIIIIIf
---
I
I
.......
---
---
May be Contamination
--- " --IMCaoyntbaemination t
May be Contamination
5~tOI
0 30t present 0 0
trace? 2030'
5-10\
0
1 Although tremolite determination is not intent of this report, crude percentages (based mostly on petrographic examination) are presented to account for log-like fibers in some of the electron mic.roqraphs. Unlike chrysotile, tremolite has no particular distinguishing feature other than morphological in some cases when examined by TEM.
CRMC-Talc-Micro-001373
Table No. 1 IDENTIFICATION AND TEM DATA ON COMMERCIAL TALCS
.Sample No
Product
Reference No.
'!'EM
Plate Numbers
1 Yellowstone, United Sierra, Montana
D.M. Inc. No. C-38
2144 A, D, and C
2 Mistron Vapor, United Sierra, Montana
D.M. Ino,. No. C-I04
2145 A, D, and C
3 Mistron Monomix, United Sierra, Montana
D.M. lDO. No. C-2S
2146 A, D, and C
4 Mistron Super Frost, united Sierra, Montana D.M. Ino. No. C-12t
2147 A, B, and C
S Fibrene C-400, United Sierra, Death Valley D.M. Ino. No. C-IOS
2148 A, D, and C
6 Charles Pfizer Talc for paper industry
D.M. Inc. No. C-68
2149 A, D, and C
7 Asbestine 5X, International Ta:lc 8 Nytal 300, R. T. Vanderbuilt
D.M. lAC. No. C-IS D.M. InO. No. C-109A
t 2150 A, B, and C
2151 A, B, and C
9 Emtal 599, EngIehard 10 Johnson & Johnson, Green Nt., Vermont
D.M. InO. No. C-13
D.M. Ina. No. C-l"
2152 A, B, and C 215a A, B, and C
11 Ita1i.an Talc e Grafite Val Chisone
J-M Bo.RE-73166-18
2154 A, D, and C
12
---1143
NOTE:
Cyc10-Fil, J-M for paper
"
Cyclo-SOrb, J-M for paper
D.M. InC. No. Std. 70-3~ .,
D.M. InC. No. Std. 70-3~
2155 A, B, and C
215.6 A, a, and C
Johnson & Johnson Baby Powder
3-M Ho ... RC-73219-1
2157 A, B, and C
t
All TEM prints are at Il\.Clgnification of 20,000 X (2 em equals 1 micron).
CRMC-Talc-Micro-001374
.
.'
Yellowstone Talc
LJ12l44A
20,000 X
CRMC-Talc-Micro-001375
Yellowstone Talc
EM2l44B
20,000 X
fIA CRMC-Talc-Micro-001376
Yellow tone Talc
2144
2 () , !) I) 0
_________--.___________r-_~_~~__~ ___________
CRMC-Talc-Micro-001377
'iis tron Vapor 'l'a lc
E~2145A
20,00
CRMC-Talc-Micro-001378
1i tron 'Jill r
Ie
21 OjOOO
CRMC-Talc-Micro-001379
tron V~1 r 'l'a lc
4 20, 00
CRMC-Talc-Micro-001380
~istron ~onomix Talc
E~2146A
20,000 X
I,
CRMC-Talc-Micro-001381
;trc)ll '10110ntl
Talc
2rJ,i}O!) ;i
CRMC-Talc-Micro-001382
IJ
14
dl
')
_UM'
CRMC-Talc-Micro-001383
Mistron Super Frost Talc
EM2147A
20,000 X
CRMC-Talc-Micro-001384
:H tron UDcr Fro t Talc
21478
20,000 X
CRMC-Talc-Micro-001385
Mistron Super Frost Talc
EM2l47C
20,000 X
__..&2a: sa
CRMC-Talc-Micro-001386
Fibrene C-400 Talc
~2148A
20,000 X
CRMC-Talc-Micro-001387
Fibrene C-400 Talc
EM2l48B
20,000 X
CRMC-Talc-Micro-001388
Fibrene C-400 Talc
EM2148C
20,000 X
CRMC-Talc-Micro-001389
Eivi2149A
Pfizer Talc 20,000 X
CRMC-Talc-Micro-001390
EM2149B
Pfizer Talc 20,000
CRMC-Talc-Micro-001391
E!'12l49C
Pfizer Talc
20,01)0
CRMC-Talc-Micro-001392
CRMC-Talc-Micro-001393
Asbestine 5X Talc
0 Bro"'l,C- 1 -'
20 , 000 X
CRMC-Talc-Micro-001394
EM2
ti ,11 iJ f () I) U
CRMC-Talc-Micro-001395
tal 00 Talc 1 0,000
CRMC-Talc-Micro-001396
Talc 20,000 X
CRMC-Talc-Micro-001397
Ny tal 300 Talc
EM2l5lC
20,000 X
CRMC-Talc-Micro-001398
,J
, I )Ii I
CRMC-Talc-Micro-001399
I I '\ I ':' 11 ('
CRMC-Talc-Micro-001400
r:mtal 599 Talc
E~2l C
20,000 X
......
CRMC-Talc-Micro-001401
J and J, Green Mt., Vt. Talc
EM2l53A
20,000 X
,....= ,w w CRMC-Talc-Micro-001402
1v i
II
- - - - - - - - -CR-M-C--Ta-lc-M-ic-ro--00-14-03- - - -
-
J and J, Green Mt., Vt. Talc
EM2l53C
20,000 X
CRMC-Talc-Micro-001404
. 1 .j !
t ] 11
CRMC-Talc-Micro-001405
Italian E;'12154 B
ti 1e
2 1000
CRMC-Talc-Micro-001406
tali n Co 14
lc 0,0 ()
___ &&z
CRMC-Talc-Micro-001407
J - ' I () - , ',] ';', I 1
) , ') I I) ') \'
__ _--------------,._._- -- - - - -_....... ....... CRMC-Talc-Micro-001408
lo-Fil Talc 2.1 20,000 X
CRMC-Talc-Micro-001409
J-M Cyclo-Fil Talc
EM2l55C
20,000 X
CRMC-Talc-Micro-001410
,J-t!l ET\121 61\
lo-Sorb 'ra lc 2rJ,OOO X
CRMC-Talc-Micro-001411
J-M Cyclo-Sorb Talc
EM2156B
20,000 X
j
CRMC-Talc-Micro-001412
CRMC-Talc-Micro-001413
" :. CRMC-Talc-Micro-001414
',I,
CRMC-Talc-Micro-001415
and ,} Ba EM21 :)7C
po\-Jd r 20,000 :r
- -.. 2&1&
..WiiiliiiiiiiiW.
CRMC-Talc-Micro-001416