Document EvqQrz9BKX3x921NpB3oqbbwn

170 FRANK A. PATTY toxic dusts, fumes, and mists (continued) * Substance mg. per cu. m.' Phosphorus pentasulfide ................................................................................. Picric acid..................................................................... .................................. * Pyrethrum ................................................................................................ * Rotenone........................................................................................................... Selenium compounds (as Se) ......................................................................... Sodium hydroxide............................................................................................ * Sodium fluoroacetate (1080) ........................................................................... * Strychnine......... :............................................................................................. Sulfuric acid ..................................................................................................... TEDP (tetraethyl dithionopyrophosphate) ................................................ TEPP (tetraethyl pyrophosphate) ................................................................ Tellurium........................................................................................................... Tetryl (2,4,6-trinitrophenylmethylnitramine) ............................................ * Thallium (soluble compounds)....................................................................... * Thiram (tetramethyl thiuram disulfide) ....................................................... Titanium dioxide ....................... i................................................................... Trichloronaphthalene ...........................'......................................................... Trinitrotoluene ................................................................................................ Uranium (soluble compounds) .................................................................................... (insoluble compounds).................................................................................. Vanadium (V,0,, dust) .................................................................................................. (V*Oa fume) ___i.'........................................................................................ *'Waffarin-(3=[a-a'cetonylbenz;yl]'-4-hydfbxVc`d(iiffafiff) ;~T. Zinc oxide fumes.............................................................................................. Zirconium compounds (as Zr) ....................................................................... 1 0.1 : 2 5 0.1 2 0.1 & 0.15 . 1 0.2 . Hi 0.05 0.1 1.5 '-*4 0.1 . 5' 15 !: 5* 13 ' '$ 0.05 055 \ 03 0.1 03` 15 6 Radioactivity: For permissible concentrations of radioisotopes in air, see Maxm Permissible Amounts of Radioisotopes in the Human Body and Maximum Permissible, centrationsin Air and Water, Handbook 52, U. S. Department of Commerce, National Bu: of Standards, March, 1953. In addition, see Permissible Dose from External Sources of Iom&_ Radiation, Handbook 59, U. S. Department of Commerce, National Bureau of Standard?, 24, 1954. Revision of the two publications mentioned above is in progress. MINERAL DUSTS Substance----------- --~----------- ~...... ------------------ ---- -....... ......-- Aluminum oxide................................................................................ Asbestos ................................ ............................................................ Dust (nuisance, no free silica) ......................................................... Mica (below 5% free silica) ............................................................ Portland, cement .............................................................................. Talc..................................................................................................... Silica high (above 50% free SiOi) ......................................................... medium (5 to 60% free SiOs) ....................................................... low (below 5% free SiO) ............................................................ Silicon carbide .................................................................................. Soapstone (below 5% free SiOi) .................................................... -&!$'J,.. ENTRY AND ACTION OF TOXIC MATERIALS 171 Af , , TENTATIVE VALUES st- :, fcp bs i*nc __ p.p.m* Approx, mg. per cu. m." tetrabromide .;..................................................... gtySSyk ether (AGE) .......................................... .............................................................. iSSWfluorid'e .................................................................... ^^ffiycidyl ether (BGE) ....................................... 1 10 2.7/m* l 60 14 45 3 270 ^Sfretaldehyde ............................................................... fflSoffifnethane (Cl Br CHi) ........................... a^tfi|r,, (DGE)......... ........... _ jj?fmamide..................................................... ip\lomef|^olniethylether ..................................... ....WftSiiB|foaa ........................................................... i iii \1 ilcBhol ............................................................ ;.......................................... glicidyl ether (IGE) ............ mumSjhySi&e .......................................................... 400 10 20 100 250 60 50 50 13 2,100 55 60 600 640 200 150 240 25 y/m.` uAl iffiSe .......................................................... 100 MWiniline....................................................... a^^lifo^m'zene ..................................................... ciromethyl mercaptan ................................................. l ' ighaijyPether (PGE) ....................................... ^rr^vje^^^iie ............................................................ T?'Tr^^.alcohol-, . .............. I^Rafisocyanate ...................................................... .............................................................. '*.! miecieft.............. > n5'inorganic compounds................................ ............ ........................................... *-'[efion'-,d(>C(MS^>sition products ................................... luSf(fiiH#)....................................................... 2 75 50 100 100 25 100 5 0 0 0.1 0.1 ' 480 9 450 08 310 240 300 0.7 100 480 6 25 0 0 ^gamea appeared on the tentative list for 1956. *`jitdata are forthcoming, it is important that atmospheric concentrations of . e:to which workers are exposed must be kept as near 0 as possible. * P pet million parts of air by volume. ^A'nagHB^^pullimina per cubic meter of air. eobic meter of air. .^^djffisffilpafticles per cubic foot of air. BSSpP'' William L. Ball Ralph S. Smith HwSitii" vfff'i'y-'' ` 4. T. Fairhall ___H.E^STPXiN.qER W. H. Reinhart S. D. Silver' W. Clark..Cooper Allan L. Coleman, Chairman ^an<^ar^8 Association has for several years been attempting for health and safety, and in 1936 it set up a