Document a1mkQDgEQnkqKGj8kabk3kXdR
FILE NAME: Talc (TALC)
DATE: 1973 Sept 4
DOC#: TALC457
DOCUMENT DESCRIPTION: Calculation of Chrysotile & Tremolite Fibers in Commercial Talcs
To;
From;
Copies:
Subject;
Johns-Manvilie '
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CONFIDENTIAL limited distribution
R. S. Lama? - R&D Ctr
V. E. Wolkodoff - R&D Ctr.'
PETROGRAPHIC CALCULATION OF
iSfDow. September 4, 1973
CHRYSOTILE AND TREMOLITE
FAMILY FIBERS IN CC 'MERCIAL TALCS BY FDA PROPOSAL OF
W it >e%-*>* at
-
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 yet on August 23, 1973.
3. The results are summarized xn Table No. 1-
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V. Wolkodoff
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cc : J. M. Sharratt
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W. L. VanDerbeek -
P. A. Martinson -
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J. p. Leineweber::-
G. R. Bell
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Notebook No. 4393, pp. 13-27
CRMC-HT-TALC-000080
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Table 1
Petrographic-Crystallographic Determination; FDA Method,
For Asbestos Fibers in Commercial Talc.-
.
V*r\ '
Product and Reference No.
1 Yellowstone, United Sierra, Montana
2 Mistron Vapor, United Sierra, Montana 3 Mistron Monomix, United Sierra, Montana 4 Mistron Super Frost, United Sierra, Montana * 5 Fibrene C-400, United Sierra, Death Valley
6 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 Vr-- --' 13 J-M Cyclo-Sorb
14 Johnson & Johnson Baby Powder
No. of Chrysotile Fibers/mg
C-38
0
C-104
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
r-u>3 *7r ^ 1
n
RC-73219-1
No. of Tremolile Fibers/mg
.
0 ' '
0
0
O'
6542
0
16800
17135 .
0
0
0
-34890
12426
0