Document 917xv5ZdyBDzYgOVj3E6ZJjoL
FILE NAME: RT Vanderbilt (RTV)
DATE: 1973 Sept 4
DOC#: RTV 183
DOCUMENT DESCRIPTION: J-M Confidential Memo RE Petrographic Calculation of Chrysotile & Tremolite [...]
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Johns-Manville
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' CONFIDENTIAL .LIMITED DISTRIBUTION
fa;. R. S. Lamar - R&D Ctr
Dmo: September 4, 1973
From; V, E. Wolkodoff - R&D Ctr.'
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Subject: PETROGRAPHIC c a l c u l a t i o n o f c h r y s o t i l e a n d TREMOLITE FAMILY FIBERS IN CC "MERCIAL TALCS BY FDA PROPOSAL O F ' AUGUST 20, 1973
1- The technique is the same as outlined to you in my letter of August 27, 1973.
2. The samples are the same as those studied by TEN and reported to you on August 23, 1973.
3. The results are summarized xn Table N o . 1 -
V. Wolkodoff
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J. M. Sharratt _ 2 West
W. L. VanDerbeek - 2 West
P. A. Martinson - 2 West
Pr-M. Hutchinson - 2-Wes t L . Pundsack - E&D Ctr
s. Speil
- R&.D Ctr
w. C. Streib
- R&D Ctr
J. P. Leineweber: - R&D Ctr
6. R. Bell
- RSD Ctr
Notebook No. 4393, pp. 13-27
CRMC-HT-TALC-000080
V
Table 1
Petx'ographic-Crystallographic Determination; FDA Method, For Asbestos Fibers in Commercial Talc.>
No.
Product and Reference No.
1 Yellowstone, United Sierra, Montana
2 Mistron Vapor, United Sierra, Montana
3 Mistron Monomix, United Sierra, Montana
4
: 5
S31 6 CD
]
Mistron Super Frost, United Sierra, Montana Fibrene C-400, United Sierra, Death Valley Charles Pfizer Asbestine 5X, International Talc
8 Nytal 300, R. T. Vanderbuilt
9 Emtal 599, Englehard
10 Johnson & Johnson, Green Mt., V t .
11 Italian Talc e Grafite Val Chisone
1/12/'' J-M Cyclo-Fil
!;' :
13 J-M Cyclo-Sorb
.
14 Johnson & Johnson Baby Powder
No. of Chrysotile Fibers/mg
C-38
0
C-104
0
C-25
89
C-124
90
C-108
1398
C-68
0
C-95
17100
C-190A .
22175
C-13
0
C-14
0
RE-73166-18
1880
Std. 70-34
0
Std. 7C-33 .
0
RC-73219-1
0
No. of Tremolile Fibers/mg 0 0 0 O' 6542 0 16800 17135 o 0 0 34890 12426 0