Document Rj2d8Ma3Rj8n147B7qw0ER0dV

FILE NAME Talc TALC DATE 1981 DOC TALC052 DOCUMENT DESCRIPTION Threshold Limit Values Brochure TLVSfi 4 Thresho; ld Limit Values 1 ; ast fi . tf ov 3 y, ae a Environment : : 4 : Mae, Substance MINERAL DUSTS SILICA SiO2 Crystalline Quartz TLV in mppcf 300 % quartz + 10 TLV for respirable dust in mg 10 m % Respirable quartz + 2 TLV for total dust respirable and nonrespirable 30 m 1 % quartz +3 +3 Cristobalite Use .......... half the value calculated from the count or mass formulae for quartz INO- Tridymite Use half the value calculated from formulae for quartz 1 Silica fused Tripoli Use quartz formulae Use respirable mass quartz for- mula Amorphous .. 20 mppcf 1233 123 1 SILICATES < % quartz 8/17 Asbestos Amosite 0.5 fiber > 5...mAla Chrysotile beeeeee 2 fibers > 5 mAla 8/17 Crocidolite .... 0.2 fiber > 5 mAla Other forms ............ 2 fibers > 5...mAla Mica ...... 20 mppcf Mineral wool fiber ........ 10 mg Perlite ...... 30 mppcf Portland Cement 30 mppcf Soapstone .... 20 mppcf Talc nonasbestiform ... 20 mppcf Talc fibrous use As- bestos limit See notice of intended changes 32 re on oe Substance TWA STEL ppm mppm mt Vanadium as V205 dust & fume oo eceeeeeeeeeee _ 0.05 _ Xylidine - Skin 2 10 _ NOTICE OF INTENDED CHANGES MINERAL DUSTS Substance TLV Diatomaceous earth natural ............- peveees Silica amorphous Talc containing no fibers Talc containing ..... 1.5 mg Respirable dust 6 mTotal dust all sampled sizes 3 mRespirable dust < 5 ...m 15mppcf or 2 m Respirable Dust 2 fibers > 5 ...m length APPENDIX A Carcinogens The Committee lists below those substances in i dustrial use that have proven carcinogenic in man i have induced cancer in animals under appropriate e perimental conditions Present listing of those su stances carcinogenic for man takes two forms Tho for which a TLV has been assigned 1a and those f which environmental conditions have not been suf ciently defined to assign a TLV 1b A1a Human Carcinogens Substances or substanc associated with industrial processes reco nized to have carcinogenic or cocarcinogen potential with an assigned TLV TLV Acrylonitrile ..........0... Asbestos Amosite . Chrysotile Crocidolite .... Other forms ........... bis Chloromethyl ether Chromite ore 2 ppm 0.5 fiber > 5...m 2 fibers > 5...m 0.2 fiber > 5...m 2 fibers > 5...m 0.001 ppm 3