Schedule 1

FIRST SCHEDULERegulations 2 and 40Permissible exposure levels of toxic substancesToxic SubstancePermissible Exposure Level (PEL) PEL (Long Term)PEL (Short Term) ppmamg/m3 bppmamg/m3 bAcetaldehyde——2545Acetic acid10251537Acetic anhydride521——Acetone750178010002380Acetone cyanohydrin——4.75Acetonitrile406760101Acetophenone1049——Acetylene tetrabromide114——Acrolein0.10.230.30.69Acrylamide—0.03——Acrylic acid25.9——Acrylonitrile (Vinyl cyanide)24.3——Adipic acid—5——Adiponitrile28.8——Aldrin—0.25——Allyl alcohol24.849.5Allyl chloride1326Allyl glycidyl ether (AGE)5231047Allyl propyl disulfide212318Aluminium Metal dust—10——Pyro powders, as Al—5——Welding fumes, as Al—5——Soluble salts, as Al—2——Alkyls, as Al—2——Aluminium oxide—10——2-Aminopyridine0.51.9——Amitrole—0.2——Ammonia25173524Ammonium chloride fume—10—20Ammonium perfluorooctanoate—0.01——Ammonium sulfamate—10——n-Amyl acetate100532——sec-Amyl acetate125665——Aniline27.6——Anisidine0.10.5——Antimony and compounds, as Sb—0.5——Antimony trioxide, as Sb—0.5——Arsenic, elemental and inorganic compounds, as As—0.01——Arsine0.050.16——Asbestos (all forms)—0.1 (fibre/cc)——Asphalt (petroleum) fumes—5——Atrazine—5——Azinphos-methyl—0.2——Barium, soluble compounds, as Ba—0.5——Barium sulfate—10——Benomyl0.8410——Benzene13.18——Benzoyl peroxide—5——Benzyl chloride15.2——Beryllium and compounds, as Be—0.002——Biphenyl0.21.3——Bismuth telluride, Undoped—10——Se-doped—5——Borates, tetra sodium salts Anhydrous—1——Decahydrate—5——Pentahydrate—1——Boron oxide—10——Boron tribromide——110Boron trifluoride——12.8Bromacil—10——Bromine0.10.660.21.3Bromine pentafluoride0.10.72——Bromoform0.55.2——1,3-Butadiene24.4——Butane8001900——n-Butanol——50152sec-Butanol100303——tert-Butanol100303——2-Butoxyethanol (EGBE)25121——n-Butyl acetate150713200950sec-Butyl acetate200950——tert-Butyl acetate200950——n-Butyl acrylate1052——n-Butylamine——515tert-Butyl chromate, as CrO3———0.1n-Butyl glycidyl ether (BGE)25133—0.1n-Butyl lactate530——Butyl mercaptan (Butanethiol)0.51.8——o-sec-Butylphenol531——p-tert-Butyl toluene16.1——Cadmium, as Cd Elemental—0.01——Compounds—0.002——Calcium carbonate (Limestone, Marble)—10——Calcium chromate, as Cr—0.001——Calcium cyanamide—0.5——Calcium cyanide———5Calcium hydroxide—5——Calcium oxide—2——Calcium silicate—10——Calcium sulfate—10——Camphor212319Caprolactam Dust—1—3Vapour5231046Captafol—0.1——Captan—5——Carbaryl—5——Carbofuran—0.1——Carbon black—3.5——Carbon dioxide5000900030,00054,000Carbon disulfide1031——Carbon monoxide2529——Carbon tetrabromide0.11.40.34.1Carbon tetrachloride (Tetrachloromethane)5311063Carbonyl fluoride25.4513Catechol (Pyrocatechol)523——Cellulose—10——Cesium hydroxide—2——Chlordane—0.5——Chlorinated camphene (Toxaphene)—0.5——Chlorinated diphenyl oxide—0.5——Chlorine0.51.512.9Chlorine dioxide0.10.280.30.83Chlorine trifluoride——0.10.38Chloroacetaldehyde——13.2Chloroacetone——13.82-Chloroacetophenone (Phenacyl chloride)0.050.32——Chloroacetyl chloride0.050.230.150.69Chlorobenzene (Monochlorobenzene)1046——o-Chlorobenzylidene malononitrile——0.050.39Chlorobromomethane (Bromochloromethane)2001060——Chlorodifluoromethane10003540——Chlorodiphenyl (42% chlorine)—1——Chlorodiphenyl (54% chlorine)—0.5——Chloroform (Trichloromethane)1049——bis (Chloromethyl) ether0.0010.0047——1-Chloro-1-nitropropane210——Chloropentafluoroethane10006320——Chloropicrin (Trichloronitromethane)0.10.67——β;-Chloroprene (2-Chloro-1,3-butadiene)1036——2-Chloropropionic acid0.10.44——o-Chlorostyrene5028375425o-Chlorotoluene50259——Chlorpyrifos—0.2——Chromium, metal and inorganic compounds, as Cr Metal and Cr III compounds—0.5——Water-soluble Cr VI compounds—0.05——Insoluble Cr VI compounds—0.01——Chromyl chloride0.0250.16——Clopidol—10——Coal, respirable dust—2——Coal tar pitch volatiles (Polycylic aromatic hydrocarbons), as benzene solubles—0.2——Cobalt, elemental and inorganic compounds, as Co—0.02——Cobalt carbonyl, as Co—0.1——Cobalt hydrocarbonyl, as Co—0.1——Copper Fume—0.2——Dusts and mists, as Cu—1——Cotton dust, raw—0.2——Cresol522——Crotonaldehyde25.7——Crufomate—5——Cumene50246——Cyanamide—2——Cyanogen1021——Cyanogen chloride——0.30.75Cyclohexane3001030——Cyclohexanol50206——Cyclohexanone25100——Cyclohexene3001010——Cyclohexylamine1041——Cyclonite—1.5——Cyclopentadiene75203——Cyclopentane6001720——Cyhexatin (Tricyclo hexyltin)—5——DDT (Dichlorodiphenyltrichloroethane)—1——Decaborane0.050.250.150.75Demeton0.010.11——Diacetone alcohol (4-Hydroxy-4-methyl-2-pentanone)50238——Diazinon—0.1——Diazomethane0.20.34——Diborane0.10.11——2-N-Dibutylaminoethanol0.53.5——Dibutyl phenyl phosphate0.33.5——Dibutyl phosphate18.6217Dibutyl phthalate—5——Dichloroacetylene——0.10.39o-Dichlorobenzene2515050301p-Dichlorobenzene1060——1,4-Dichloro-2-butene0.0050.025——Dichlorodifluoromethane10004950——1,3-Dichloro-5,5-dimethyl hydantoin—0.2—0.41,1-Dichloroethane (Ethylidene chloride)100405——1,2-Dichloroethylene (Acetylene dichloride)200793——Dichloroethyl ether5291058Dichlorofluoromethane1042——1,1-Dichloro-1-nitroethane212——1,3-Dichloropropene14.5——2,2-Dichloropropionic acid15.8——Dichlorotetrafluoroethane10006990——Dichlorvos0.10.90——Dicrotophos—0.25——Dicyclopentadiene527——Dicyclopentadienyl iron—10——Dieldrin—0.25——Diethanolamine0.462——Diethylamine51515452-Diethylaminoethanol29.6——Diethylene triamine14.2——Diethyl ketone200705——Diethyl phthalate—5——Difluorodibromomethane100858——Diglycidyl ether (DGE)0.10.53——Diisobutyl ketone (2,6-Dimethyl-4-heptanone)25145——Diisopropylamine521——N,N-Dimethyl acetamide1036——Dimethylamine59.21527.6Dimethylaniline (N,N-Dimethylaniline)5251050Dimethylformamide1030——1,1-Dimethylhydrazine0.51.2——Dimethylphthalate—5——Dimethyl sulfate0.10.52——Dinitolmide (3,5-Dinitro-o-toluamide)—5——Dinitrobenzene0.151.0——Dinitro-o-cresol—0.2——Dinitrotoluene—0.15——Dioxane2590——Dioxathion—0.2——Diphenylamine—10——Dipropylene glycol methyl ether100606150909Dipropyl ketone50233——Diquat Total dust—0.5——Respirable dust—0.1——Di-sec-octyl phthalate (Di (-2-ethylhexyl) phthalate)—5—10Disulfiram—2——Disulfoton—0.1——2,6-Di-tert-butyl-p-cresol—10——Diuron—10——Divinyl benzene1053——Emery—10——Endosulfan—0.1——Endrin—0.1——Enflurane75566——Epichlorohydrin (1-Chloro-2, 3-epoxypropane)27.6——EPN—0.1——Ethanol (Ethyl alcohol)10001880——Ethanolamine37.5615Ethion—0.4——2-Ethoxyethanol (EGEE)518——2-Ethoxyethyl acetate (EGEEA)527——Ethyl acetate4001440——Ethyl acrylate5201561Ethylamine59.21527.6Ethyl amyl ketone (5-Methyl-3-heptanone)25131——Ethyl benzene100434125543Ethyl bromide522——Ethyl butyl ketone (3-Heptanone)50234——Ethyl chloride10002640——Ethylene chlorohydrin——13.3Ethylenediamine (1,2-Diaminoethane)1025——Ethylene dichloride (1,2-Dichloroethane)1040——Ethylene glycol——50127Ethylene glycol dinitrate0.050.31——Ethylene oxide11.8——Ethylenimine0.50.88——Ethyl ether (Diethyl ether)40012105001520Ethyl formate100303——Ethylidene norbornene——525Ethyl mercaptan (Ethanethiol)0.51.3——N-Ethylmorpholine524——Ethyl silicate1085——Fenamiphos—0.1——Fensulfothion—0.1——Fenthion—0.2——Ferbam—10——Ferrovanadium dust—1—3Fibrous glass dust—10——Fluorides, as F—2.5——Fluorine11.623.1Fonofos—0.1——Formaldehyde——0.30.37Formamide1018——Formic acid59.41019Furfural27.9——Furfuryl alcohol10401560Gasoline3008905001480Germanium tetrahydride0.20.63——Glutaraldehyde——0.20.82Glycerin mist—10——Glycidol (2,3-Epoxy-1-propanol)2576——Grain dust (oat, wheat, barley)—4——Graphite, respirable dust—2——Hafnium—0.5——Halothane50404——Heptachlor and Heptachlor epoxide—0.05——Heptane40016405002050Hexachlorobenzene—0.025——Hexachlorobutadiene0.020.21——Hexachlorocyclopentadiene0.010.11——Hexachloroethane19.7——Hexachloronaphthalene—0.2——Hexafluoroacetone0.10.68——Hexamethylene diisocyanate0.0050.034——1,6-Hexanediamine0.52.3——Hexane (n-Hexane)50176——Other isomers500176010003500sec-Hexyl acetate50295——Hexylene glycol——25121Hydrazine0.10.13——Hydrogenated terphenyls0.54.9——Hydrogen bromide——39.9Hydrogen chloride——57.5Hydrogen cyanide——4.75Hydrogen fluoride——32.6Hydrogen peroxide11.4——Hydrogen selenide0.050.16——Hydrogen sulfide10141521Hydroquinone (Dihydroxy benzene)—2——2-Hydroxypropyl acrylate0.52.8——Indene1048——Indium and compounds, as In—0.1——Iodine——0.11.0Iodoform0.610——Iron oxide dust and fume, as Fe—5——Iron pentacarbonyl, as Fe0.10.230.20.45Iron salts, soluble, as Fe—1——Isoamyl acetate100532——Isoamyl alcohol100361125452Isobutyl acetate150713——Isobutyl alcohol50152——Isooctyl alcohol50266——Isophorone——528Isophorone diisocyanate0.0050.045——Isoproproxyethanol25106——Isopropyl acetate25010403101290Isopropyl alcohol4009835001230Isopropylamine5121024N-Isopropylaniline211——Isopropyl ether25010403101300Isopropyl glycidyl ether (IGE)5023875356Kaolin, respirable dust—2——Ketene0.50.861.52.6Lead, inorganic dusts and fumes, as Pb—0.15——Lead arsenate—0.15——Lead chromate as Pb—0.05——as Cr—0.012——Lindane—0.5——Lithium hydride—0.025——L.P.G. (Liquified petroleum gas)10001800——Magnesite—10——Magnesium oxide fume—10——Malathion—10——Maleic anhydride0.251.0——Manganese, as Mn Dust and compounds—1——Fume—1—3Manganese cyclopentadienyl tricarbonyl, as Mn—0.1——Mercury Alkyl compounds—0.01—0.03Aryl compounds—0.1——Inorganic forms including metallic mercury—0.025——Mesityl oxide156025100Methacrylic acid2070——Methanol (Methyl alcohol)200262250328Methomyl—2.5——Methoxychlor—10——2-Methyoxyethanol (EGME)516——2-Methoxyethyl acetate (Ethylene glycol methyl ethyl acetate, EGMEA)524——4-Methoxyphenol—5——Methyl acetate200606250757Methyl acetylene (Propyne)10001640——Methyl acetylene-propadiene mixture (MAPP)1000164012502050Methyl acrylate1035——Methylacrylonitrile12.7——Methylal (Dimethoxymethane)10003110——Methylamine56.41519Methyl n-amyl ketone (2-Heptanone)50233——N-Methyl aniline0.52.2——Methyl bromide519——Methyl-tert butyl ether40144——Methyl n-butyl ketone (2-Hexanone)520——Methyl chloride50103100207Methyl 2-cyanoacrylate29.1418Methylcyclohexane4001610——Methylcyclohexanol50234——0-Methylcyclohexanone50229753442-Methylcyclopentadienyl manganese tricarbonyl, as Mn—0.2——Methyl demeton—0.5——Methylene bisphenyl isocyanate (MDI, Diphenyl methane diisocyanate)0.0050.051——Methylene chloride (Dichloromethane)50174——4,4’-methylene bis (2-chloroaniline) [MOCA]0.010.11——Methylene bis (4-cyclo-hexylisocyanate)0.0050.054——4,4’-Methylene dianiline0.10.81——Methyl ethyl ketone (MEK, 2-Butanone)200590300885Methyl ethyl ketone peroxide——0.21.5Methyl formate100246150368Methyl hydrazine——0.20.38Methyl iodide212——Methyl isoamyl ketone50234——Methyl isobutyl carbinol (Methyl amyl alcohol)2510440167Methyl isobutyl ketone (Hexone)5020575307Methyl isocyanate0.020.047——Methyl isopropyl ketone200705——Methyl mercaptan (Methanethiol)0.50.98——Methyl methacrylate100410——Methyl parathion—0.2——Methyl propyl ketone (2-Pentanone)200705250881Methyl silicate16——α;Methyl styrene50242100483Metribuzin—5——Mevinphos (Phosdrin)0.010.0920.030.27Mica, respirable dust—3——Mineral wool fiber—10——Molybdenum, as Mo Soluble compounds—5——Insoluble compounds—10——Monocrotophos—0.25——Morpholine2071——Naled (Dimethyl-1,2-dibromo-2,2 dichloroethyl phosphate)—3——Naphtha3001370——Naphthalene10521579Nickel Metal—1——Insoluble compounds, as Ni—1——Soluble compounds, as Ni—0.1——Nickel carbonyl, as Ni0.050.12——Nickel sulfide, as Ni—1——Nicotine—0.5——Nitrapyrin (2-Chloro-6-

(trichloromethyl) pyridine)—10—20Nitric acid25.2410Nitric oxide2531——p-Nitroaniline—3——Nitrobenzene15——p-Nitrochlorobenzene0.10.64——Nitroethane100307——Nitrogen dioxide35.659.4Nitrogen trifluoride1029——Nitroglycerin (NG)0.050.46——Nitromethane2050——1-Nitropropane2591——2-Nitropropane1036——Nitrotoluene211——Nitrous oxide5090——Nonane2001050——Nuisance particulates—10——Octachloronaphthalene—0.1—0.3Octane30014003751750Oil Mist, mineral—5—10Osmium tetroxide, as Os0.00020.00160.00060.0047Oxalic acid—1—2Oxygen difluoride——0.050.11Ozone——0.10.20Paraffin wax fume—2——Paraquat Total dust—0.5——Respirable dust—0.1——Parathion—0.1——Pentaborane0.0050.0130.0150.039Pentachloronaphthalene—0.5——Pentachloronitrobenzene—0.5——Pentachlorophenol—0.5——Pentaerythritol—10——Pentane60017707502210Perchloroethylene (Tetrachloroethylene)25170100685Perchloromethyl mercaptan0.10.76——Perchloryl fluoride313625Perfluoroisobutylene——0.010.082Perlite—10——Phenol519——Phenothiazine—5——Phenylenediamine—0.1——Phenyl ether17214Phenyl glycidyl ether (PGE)0.10.6——Phenylhydrazine0.10.44——Phenyl mercaptan0.52.3——Phenylphosphine——0.050.23Phorate—0.05—0.2Phosgene0.10.40——Phosphine0.30.4211.4Phosphoric acid—1—3Phosphorus0.020.1——Phosphorus oxychloride0.10.63——Phosphorus pentachloride0.10.85——Phosphorus pentasulfide—1—3Phosphorus trichloride0.21.10.52.8Phthalic anhydride16.1——m-Phthalodinitrile—5——Picloram—10——Picric acid (2,4,6-Trinitrophenol)—0.1——Pindone (2-Pivalyl-1,3-indandione)—0.1——Piperazine dihydrochloride—5——Platinum Metal—1——Soluble salts, as Pt—0.002——Portland cement—10——Potassium cyanide———5Potassium hydroxide———2Propargyl alcohol12.3——β-Propiolactone0.51.5——Propionic acid1030——Propoxur—0.5——n-Propyl acetate2008352501040n-Propyl alcohol200492250614Propylene dichloride (1,2-Dichloropropane)75347110508Propylene glycol dinitrate0.050.34——Propylene glycol monomethyl ether100369150553Propylene imine24.7——Propylene oxide (1,2-Epoxypropane)2048——n-Propyl nitrate2510740172Pyrethrum—5——Pyridine516——Quinone0.10.44——Resorcinol10452090Rhodium Metal—1——Insoluble compounds, as Rh—1——Soluble compounds, as Rh—0.01——Ronnel—10——Rotenone—5——Rouge—10——Selenium and compounds, as Se—0.2——Selenium hexafluoride0.050.16——Sesone—10——Silica-Amorphous Diatomaceous earth (uncalcined)—10——Precipitated silica—10——Silica, fume, respirable dust—2——Silica, fused, respirable dust—0.1——Silica gel—10——Silica-Crystalline Cristobalite, respirable dust—0.05——Quartz, respirable dust—0.1——Tridymite, respirable dust—0.05——Tripoli, respirable dust—0.1——Silicon—10——Silicon carbide—10——Silicon tetrahydride56.6——Silver Metal—0.1——Soluble compounds, as Ag—0.01——Soapstone Respirable dust—3——Total dust—6——Sodium azide as Hydrazoic acid———0.29vapour——0.11—Sodium bisulfite—5——Sodium cyanide———5Sodium fluoroacetate—0.05——Sodium hydroxide———2Sodium metabisulfite—5——Starch—10——Stearates—10——Stibine0.10.51——Stoddard solvent100525——Strontium chromate—0.0005——Strychnine—0.15——Styrene, monomer (Phenylethylene, vinyl benzene)50213100426Subtilisins———0.00006Sucrose—10——Sulfometuron methyl—5——Sulfotep—0.2——Sulfur dioxide25.2513Sulfur hexafluoride10005970——Sulfuric acid—1—3Sulfur monochloride——15.5Sulfur pentafluoride——0.010.10Sulfur tetrafluoride——0.10.44Sulfuryl fluoride5211042Sulprofos—1——Talc—2——Tantalum, metal and oxide, as Ta—5——Tellurium and compounds, as Te—0.1——Tellurium hexafluoride0.020.10——Temephos—10——Terephthalic acid—10——TEPP0.0040.047——Terphenyls——0.5351,1,1,2-Tetrachloro-2,2-difluoroethane5004170——1,1,2,2-Tetrachloro-1,2-difluoroethane5004170——1,1,2,2-Tetrachloroethane16.9——Tetrachloronaphthalene—2——Tetraethyl lead, as Pb—0.1——Tetrahydrofuran200590250737Tetramethyl lead, as Pb—0.15——Tetramethyl succinonitrile0.52.8——Tetranitromethane0.0050.04——Tetrasodium pyrophosphate—5——Tetryl (2,4,6-Trinitrophenyl methylnitramine)—1.5——Thallium, elemental and soluble compounds, as Ti—0.1——4,4’-Thiobis (6-tert-butyl-m-cresol)—10——Thioglycolic acid13.8——Thioyl chloride——14.9Thiram—1——Tin Metal—2——Oxide inorganic compounds, as Sn—2——Organic compounds, as Sn—0.1—0.2Titanium dioxide—10——Toluene (Toluol)50188——Toluene-2,4-diisocyanate (TDI)0.0050.0360.020.14Toluidine28.8——Tributyl phosphate0.22.2——Trichloroacetic acid16.7——1,2,4-Trichlorobenzene——5371,1,1-Trichloroethane (Methyl chloroform)350191045024601,1,2-Trichloroethane1055——Trichloroethylene50269100537Trichlorofluoromethane——10005620Trichloronaphthalene—5——1,2,3-Trichloropropane1060——1,1,2-Trichloro-1,2,2-trifluoroethane1000767012509590Triethanolamine—5——Triethylamine14.1520.7Trifluorobromomethane10006090——Trimellitic anhydride———0.04Trimethylamine5121536Trimethyl benzene25123——Trimethyl phosphite210——2,4,6-Trinitrotoluene (TNT)—0.5——Triorthocresyl phosphate—0.1——Triphenyl amine—5——Triphenyl phosphate—3——Tungsten, as W Insoluble compounds—5—10Soluble compounds—1—3Turpentine100566——Uranium Soluble & Insoluble compounds, as U—0.2—0.6n-Valeraldehyde50176——Vanadium pentoxide Respirable dust or fume—0.05——Vegetable oil mists—10——Vinyl acetate10351553Vinyl bromide522——Vinyl chloride (Chloroethylene)513——4-Vinyl cyclohexene0.10.4——Vinyl cyclohexene dioxide1057——Vinylidene chloride (1,1-Dichloroethylene)5202079Vinyl toluene50242100483Warfarin—0.1——Welding fumes—5——Wood dust Hard wood—1——Soft wood—5—10Xylene100434150651m-Xylene α;, α;1-diamine———0.1Xylidine (dimethylaminobenzene)0.52.5——Yttrium metal and compounds, as Y—1——Zinc chloride fume—1—2Zinc chromates, as Cr—0.01——Zinc oxide Fume—5—10Dust—10——Zirconium and compounds, as Zr—5—10Notes: