Document K6yn8jvozv4pKD19pp0neqRoQ

FILE NAME: Talc (TALC) DATE: 1981 DOC#: TALC052 DOCUMENT DESCRIPTION: Threshold Limit Values Brochure TLVs Threshold Limit Values V i,'i ' {. t * i . > , (Chemical Substances! '-Y i - .s i t h ; i@3JPhysjcal.:Agentsf' "' '' Substance SILICA, S i0 2 MINERAL DUSTS Crystalline Quartz TLV in mppcf"1: 300'" % quartz + 10 TLV for respirable dust in mg/m3: ____________10 mg/m3l)____________ . % Respirable quartz + 2 TLV for "total dust," respirable and nonrespirable: 30 mg/m3 % quartz + 3 C rlstoballte.................Use one-half the value calculated from the count or mass formulae for quartz. Tridymite Use one-half the value calculated from formulae for quartz. Silica, fused Use quartz formulae. Tripoli Use respirable'1' mass quartz for mula **Am orphous................................................ ` ............ (20 m ppcf"') ''i^V/.i *i`****'**' ' 'iM '. c.'*". ``,i 'r`: ' i : ': 1 Sv.'/ i '& p f t i l '/#$'<*. ?h - :' - " * ,' V '-.-'" ! " V V-1 . . I '' * ' ; .. . ' . ; ; ., .V ; ." ''1 A \ . v<^ --V '. < .. . . . SILICATES (< 1% quartz) Asbestos Am osite........ C h ry s o tile ... Crocidolite Other fo rm s . . . . M ica............................ Mineral wool fiber P e r lit e ........................ Portland Cement.. S o a p s t o n e ............... **Talc (nonasbestiform) " T a lc (fibrous), (use bestos limit.) . 0 .5 fiber > 5/xm/cc, A1a . 2 fibers > 5/tm /cc, A1a 0 .2 fiber > 5/tm /cc, A1a . 2 fibers > 5/zm/cc, A1a . 20 mppcf . 10 mg/m3 . 30 mppcf . 30 mppcf . 20 mppcf . (20 mppcf) " S e e notice of intended changes 32 1 0 2 i2 3 3 .3 _ J i0 1 15 4 15 15 30 30 I 3 Substance Vanadium, as V2O5, dust & f u m e ............................ Xytidine -- Skin................ TWA STEL ppm"1 mg/mM ppm"' mt -- 0.05 -- 2 10 -- NOTICE OF INTENDED CHANGES MINERAL DUSTS Substance TLV Diatomaceous earth, n atu ral................................... Silica, amorphous................. Talc (containing no fibers) Talc (fiber-containing)....... 1.5 mg/m3, Respirable dust 6 mg/m3, Total dust (all sampled sizes) 3 mg/m3, Respirable dust ( < 5 /tm) ` 15 mppcf or 2 mg/m3, Respirable Dust 2 fibers/cc, > 5 /cm in length APPENDIX A Carcinogens The Committee lists below those substances In i dustrial use that have proven carcinogenic in man, 1 have induced cancer in animals under appropriate e perimental conditions. Present listing of those su stances carcinogenic for man takes two forms: Thos 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, orsubstanci associated with industrial processes, reco nized to have carcinogenic or cocarcinoger potential, with an assigned TLV: TLV A c r y lo n it r ile ........................ Asbestos A m o site ............................ Chrysotile........................ Crocidolite...................... Other fo rm s .................. bis (Chloromethyl) ether Chromite ore 2 ppm 0.5 fiber > 5/tm/cc 2 fibers > 5/tm/cc 0.2 fiber > 5/tm/cc 2 fibers > 5/tm/cc 0.001 ppm 3.