Document OdexgR4VBMJa2KgMoYY82Oow

164 CHAPTER 8 1951 Guide Table 3. Maximum Allowable Concentration op Gases and Vapors Acetaldehyde....... . Acetio acids........... Acetio anhydride.. Acetone.................. Acrolein................. .AA Tcrsymloonniintr,ile^........ Amyl acetate.___ iso*Amyl alcohoL. Aniline................... Arsine................... Benzene (benzol). Bromine................ 1,3-Butadiene....... n-Butanol.............. 2-Butanone................ n-Butyl acetate........ Butyl "cellosolve"... Carbon dioxide......... Carbon disulfide....... Carbon monoxide............... Carbon tetrachloride....... "Cellosolve"........................ "Cellosolve" acetate........... Chlorine............................ 2-Chlorobutadiene.............. Chloroform................. l-Chloro-l-nitropropane.... Cyclohexane........................ Cydohexano!....................... Cyclohexanone................... Cyclohexene....................... Cyclopropane (propene).. o-Diemorobenzene............ Dichlorodifluoromethane.. 1.1-Dichloroethane................... ;............... 1.2-Dichloroethane (ethylene dichloride) 1.2-Dichloroethylene................................. Dichloroethyl ether......................... Dichloromethane....................... ......... Dichloromonofluormethane................ 1.1-Dichloro-l-nitroethane....................... . 1.2-Dichloropropane (propylene dichlo ride). ...................................i........... Diehlorotetrafluoroethane................... , Dimethylandine............ Dimethylsulfate............ Dioxane........................... Ethyl acetate.................. Ethyl alcohol....... ........ Ethyl benzene.............. Ethyl bromide............ . Ethyl chloride............. Ethylene chlorhydrin.'. 'Ethylene oxide___ Ethyl ether................... Ethyl formate....... Ethyl silicate................ Formaldehyde.............. . Gasoline......................... Heptane....................... ................ Hexane............................................. Hydrogen chloride..................... Hydrogen cyanide...................... Hydrogen fluoride............ ;........... ASA Stand ards M.A.C. ppm Threshold Limit Values A.C.QJ.H.* 1 ppm 200 10 5 500 0.5 *2! 200 100 0.05 35 1000 50 250 200 200 5000 20 100 50 200 100 Gm/cu m or Oz/1000 cu 0.36 0.02554 0.02085 1.2065 0.1145 0.01336 1.064 0.36 0.019 0.11393 0.00653 2.210 0.1515 0.735 0.948 0.966 Oz/1000 cu ft*> 0.43 0.02 0.02 1.21 0.013 0.05 ` 1.16 0.41 0.02 0.12 0.03 3.3 0.18 0.68 1.04 1.02 0.313 0.736 0.54 0.19 0.76 0.53 25 100 20 400 100 100 400 400 50 1000 100 75 200 15 500 1000 10 75 1000 5 \1 100 400 1000 200 .1000 5 100 400 100 100 5 500 500 5 10 0.0905 0.488 0.101 1.375 0.409 0.401 1.34 0.6875 0.3005 4.94 0.405' 0.3038 0.794 0.0878 1.74 4.20 0.0589 0.3265 6.98 0.02475 0.00515 0.36 1.44 1.881 0.868 0.892 2.64 0.01645 0.18 1.212 0.303 0.851 0.006135 2.045 2.05 1.76 0.00746 0.01104 0.00245 < 0.09 0.31 0.08 1.69 0.42 0.41 1.58 0.91 0.24. 3.18 0.33 0.23, 0.59 0.08 1.25 .2.83 0.4 0.29 4136 0.02 0.003 . 0.33 1.52 2.2 0.96 0.59 2.75 0.015 0.09 1.67 0.316 0.87 0.005 2.89 . 2.87 ' 2.54 0.004 0.015 0.003 Air Contaminants 165 tables. Maximum ^owab^^oncentbation op Gases and Vapors. ASA Stand-' abds MA.C. Threshold Limit Values A.C.QJ.H * 1949 Gm/cu m or Oz/1000 cu ftb Oz/1000 cu ft Hydrogen selemde. Hydrogen sulfide... Iodine...................... Isophorone.............. Mesityl oxide........... Methanol................................... Methyl acetate......................... Methyl bromide....................... Methyl butanone..................... Methyl "cellosolve"................. Methyl "cellosolve" acetate.'.. Methyl chloride........................ Methyl cyclohexane................. Methyl cydohexanol............... Methyl cyclohexanone............ Methyl formate............... . Methyl iso-butyl ketone........J Monochlorobenzene................. Monofiuorotrichloromethane.. Mouonitrotolueno.................... Naphtha (coal tar)................. Naphtha (petroleum)............ Nickel carbonyl....................... Nitrobenzene.......... .............. . Nitroethane............................ Nitrogen oxides (other than nitrous oxide).................................................. Nitroglycerine...........:.......................... Nitromethane...................................... 2- Nitropropane.................................... Octane................................................. Ozone............................................. Pentane........................................... Peatanone (methyl propanone).. Phosgene.................................... . Phoaphine....................................... Phosphorus trichloride................ iso-Propanol............................ Propyl acetate............................... iso-Propyl ether........................... Stibine............................ ............. Stoddard solvent................ Styrene monomer................ Sulfur chloride.................... Sulfur dioxide...........-........ 1,1,2,2-Tetrachloroethane.. Tetrachloroethylene.. Toluene...................... Toluidine................... Trichloroethylene.. Turpentine................ Vinyl chloride (chloroethane). Xylene....... ................................. 200 200 ' 1 25 50 20 100 25 25 100 500 100 100 100 100 75 1000 6 200 600 1 1 100 25 0.5 100 50 500 1 1000 200 `1 0.05 .0.5 400 200 ,,500 0.1 500 200 1 *10 5; 100 ' 200 - 5 100 100 500 200 0.01039 0.141 0.2005 0.606 0.0778 0.352 0.7775 0.1208 0.2086 2.005 0.466 0.458 0.2554 0.409 0.3465 5.61 0.028 0.638 ' 1.945 0.00697 0.00503 0.307 0.00464 0.2495 0.182 2.33 2.94 0.704 0.00281 1.022 0.834 2.085 2.845 0.85 0.00552 0.343 0.679. 0.752 * 0.0219 0.536 0.656 1.28 0.868 A.C.G.I.H. = American Conference of Governmental Industrial Hygienists. b Fluid ounces (at 20 C) of.chemical in 1000 cu ft. % 0.0002 0.15 0.22 0.32 0.62 0.04 0.41 0.078. 0.11 0.22 2.44 0.49 0.48 0.25 0.49 0.3 3.59 0.23. 0.71 2.6 0.006 0.004 0.275 0.003 0.21 0.17 3.17 `4.5 0.82 0.0018 1.22 0.885 ' 2.75 3.4 0.89 '* 0.003 0.02 0.405 0.83. 0.02 0.35 0.58' 1.33 0.96 apply a reasonable safety factor to the ventilation estimate without cori7 sideration of the concentrations,of gases or vapors that approach the danger . point. Safety engineers prefer to limit the concentration to J or % of, the lower explosive limit, and this fact should be given full weight in determin ing the capacity and; design. ,qf. ventilating equipment. Rarely sSould