Hazardous Chemicals Handbook 2 Episode 5 potx

Table 5.12 Hygiene standards ( see key and notes on pages 108–110) Threshold limit values (USA) Occupational exposure limits (UK) Air odour Substance TWA STEL TWA (c) STEL (c) threshold (ppm) (a) (mg/m 3 ) (b) (ppm) (a) (mg/m 3 ) (b) (ppm) (mg/m 3 ) (ppm) (mg/m 3 ) (ppm; v/v) Acetaldehyde – – C25 – 20 37 50 92 2000 Acetic acid 10 25 15 37 10 25 15 37 21 Acetic anhydride 5C – – – 0.5 0.1 2 0.4 39 Acetone 500 – 750 – 750 1810 1500 3620 57 Acetone cyanohydrin – – SKC4.7 – – – – – – Acetonitrile 40 67 60 101 40 68 60 102 0.23 Acetophenone 10 – – – – – – – – Acetylene – (d) –– – (d) – – 230 Acetylene dichloride, see 1,2-Dichloroethylene Acetylene tetrabromide 1 14 – – Acetylsalicylic acid (aspirin) – 5 – – – 5 – – Acrolein – – C0.1 – 0.1 0.25 0.3 0.8 0.61 Acrylamide SK – 0.03 (e) – – SK – 0.3 MEL – – Acrylic acid SK 2 5.9 – – 10 30 20 60 110 Acrylonitrile SK 2 (e) 4.3 (e) – – SK 2 4.4 MEL – – 0.12 Adipic acid – 5 – – – – – – – Adiponitrile 2 – – – – – – – – Aldrin SK – 0.25 – – SK – 0.25 – 0.75 Allyl alcohol SK 0.5 – – – SK 2 4.8 4 9.7 1.8 Allyl chloride 1 3 2 6 – – – – 0.84 Allyl glycidyl ether (AGE) 1 – – – SK 5 24 10 47 Allyl propyl disulphide 2 12 3 18 – – – – α-Alumina, see Aluminium oxide Aluminium Total inhalable dust – – – – – 10 – – Respirable dust – – – – – 4 – – Metal dust – 10 – – – – – – Pyro powders, as Al – 5 – – – – – – Welding fumes, as Al – 5 – – – – – – Alkyls (NOC-d), as Al – 2 – – – – – – Aluminium oxides Total inhalable dust – 10 – – – 10 – – Respirable dust – – – – – 4 – – Aluminium salts (soluble) – 2 – – – 2 – – 4-Aminodiphenyl SK – (g) –– – – – – 2-Aminoethanol, see Ethanolamine 2-Aminopyridine 0.5 2 – – 0.5 2 2 8 Amitrole – 0.2 – – – – – – Ammonia 25 17 35 24 25 18 35 25 4.8 Ammonium chloride fume – 10 – 20 – 10 – 20 Ammonium perfluorooctanoate SK – 0.01 – – – – – – Ammonium sulphamate – 10 – – – 10 – 20 Amosite, see Asbestos n -Amyl acetate 50 – 100 – 50 270 100 541 1800 sec-Amyl acetate 50 – 100 – 50 270 100 541 61000 Aniline and homologues SK 2 7.6 – – SK 1 4 – – 1.9 Anisidine (o-, p-isomers) SK 0.1 0.5 – – SK 0.1 0.5 – – Antimony and antimony compounds except stibine (as Sb) – 0.5 – – – 0.5 – – Antimony hydride (Stibine) 0.1 – – – 0.1 0.52 0.3 1.6 Antimony trioxide production (g) ––– ––– p -Aramid respirable fibres (1) –––– ANTU – 0.3 – – – – – – Argon – (d) –– – (d) –– Arsenic elemental and inorganic – 0.01 (g) –– – – – – compounds As (except arsine) Arsenic trioxide production – (e) –– – – – – Arsine 0.05 0.16 – – 0.05 0.16 – – 0.10 Asbestos, all forms (g) 0.1 (j) Fibre/cc (h) Asphalt (petroleum) fumes – 0.5 – – – 5 – 10 Atrazine – 5 – – – 10 – – Azinphos-methyl SK – 0.2 – – SK – 0.2 – 0.6 Azodicarbonamide – – – –SEN – 1.0 – 3 MEL Barium, soluble – 0.5 – – – 0.5 – – compounds, as Ba Barium sulphate Respirable dust – – – – – 4 – – Total inhalable dust – 10 – – – 10 – – Benomyl – 10 – – – 10 – 15 Benzene 0.5 (g) – 2.5 – 5 15 MEL – – 0.85 Benz(a)anthrene (e) Benzenethiol – – – – 0.5 2.3 – – Benzene-1,2,4-tricarboxylic – – – C0.04 SEN – 0.04 – 0.12 acid 1,2-anhydride Benzidine SK – (g) –– – – – – p -Benzoquinone, see Quinone Benzo(b)fluoanthene (e) Benzoyl peroxide – 5 – – – 5 – – Benzo(a)pyrene – (e) –– – – – – Benzotrichloride SK (e) – C0.1 – – – Benzoyl chloride – – C0.5 – – – – (1) p -Aramid respirable fibres are subject to an OES of 0.5 fibres/ml, 8 hr TWA Table 5.12 Cont’d Threshold limit values (USA) Occupational exposure limits (UK) Air odour Substance TWA STEL TWA (c) STEL (c) threshold (ppm) (a) (mg/m 3 ) (b) (ppm) (a) (mg/m 3 ) (b) (ppm) (mg/m 3 ) (ppm) (mg/m 3 ) (ppm; v/v) Benzyl acetate 10 – – – – – Benzyl butyl phthalate – – – – – 5 – – Benzyl chloride 1 5.2 – – 0.5 2.6 1.5 7.9 23 Beryllium and compounds, – 0.002 (g) – 0.01 – 0.002 – as Be Biphenyl 0.2 1.3 – – 0.2 1.3 0.6 3.8 240 2,2-Bis(p-chlorophenyl)- – – – – – 1 – 3 1,1,1-trichloroethane see Diglycidyl ether Bis(2-dimethylamino-ethyl) ether 0.05 – 0.15 – –––– Bis(2-ethyl hexyl) phthalate – – – – – 5 – 10 Bismuth telluride – 10 – – – 10 – 20 Se-doped – 5 – – – 5 – 10 Borates, tetra, sodium salts Anhydrous – 1 – – – 1 – – Decahydrate – 5 – – – 5 – – Pentahydrate – 1 – – – 1 – – Bornan-2-one 2 – 4 – 2 13 3 19 Boron oxide – 10 – – – 10 – 20 Boron tribromide – – C1 – – – 1 10 Boron trifluoride – – C1 – – – 1 2.8 Bromacil – 10 – – 1 11 2 22 Bromine 0.1 0.66 2 1.3 0.1 0.7 0.3 2 Bromine pentafluoride 0.1 0.72 – – 0.1 0.7 0.3 2.2 2.0 Bromochloromethane, see Chlorobromomethane Bromoethane, see Ethyl bromide Bromoform SK 0.5 5.2 – – SK 0.5 5 – – 0.39 Bromomethane, see Methyl bromide Bromotrifluoromethane 1000 6190 – – 1000 6190 1200 7430 1,3-Butadiene 2 (e) – – – 10 22 MEL – – 640 Butane 800 1900 – – 600 1450 750 1810 0.29 Butanethiol, see Butyl mercaptan 2-Butanone, see Methyl ethyl ketone (MEK) trans-But-2-enal – – – – 2 6 6 18 2-Butoxyethanol (EGBE) SK 20 – – – SK 25 123 MEL – – 250 n -Butyl acetate 150 713 200 950 150 724 200 966 390 sec-Butyl acetate 200 950 – – 200 966 250 1210 tert-Butyl acetate 200 950 – – 200 966 250 1210 Butyl acrylate 2 – – – 10 53 – – 290 n -Butyl alcohol SK – – C50 – SK – – 50 154 60 sec-Butyl alcohol 100 303 – – 100 308 150 462 38 tert-Butyl alcohol 100 303 – – 100 308 150 462 2.1 Butylamine SK – – C5 – SK – – 5 15 2.7 n -Butyl chloroformate – – – – 1 5.6 – – tert-Butyl chromate, as CrO 3 SK – – – C0.1 –––– Butylated hydroxy toluene – 10 – – – 10 – – n -Butyl glycidyl ether (BGE) 25 133 – – 25 135 – – n -Butyl lactate 5 30 – – 5 30 – – 0.71 Butyl mercaptan 0.5 1.8 – – ––––510 o -sec-Butylphenol SK 5 31 – – SK 5 30 – – p -tert-Butyltoluene 1 6 20 121 ––––2.0 Cadmium dusts and salts, as Cd elemental – 0.01 (e) –– – compounds, as Cd – 0.002 (e) – – (except cadmium sulphide Cadmium oxide pigments) fume, as Cd – – – – – 0.025 MEL 0.05 MEL Cadmium sulphide pigments, – – – – – 0.03 MEL – – respirable dust, as Cd Caesium hydroxide – 2 – – – 3 – – 10 (total inhalable dust) – –4–– (respirable dust) Calcium chromate – 0.001 (e) ––––––– Calcium cyanamide – 0.5 – – – 0.5 – 1 Calcium hydroxide – 5 – – – 5 – – Calcium oxide – 2 – – – 2 10 (total inhalable dust) – – 4 (respirable dust) 10 (total (inhalable dust) – – 4 (respirable dust) Camphor, synthetic, see Bornan-2-one Caprolactam Dust – 1 – 3 – 1 – 3 Vapour 5 23 10 47 5 23 10 47      Calcium sulphate – 10 (f) –– –      Calcium silicate – 10 (f) –– –      Calcium carbonate – 10 (f) –– Table 5.12 Cont’d Threshold limit values (USA) Occupational exposure limits (UK) Air odour Substance TWA STEL TWA (c) STEL (c) threshold (ppm) (a) (mg/m 3 ) (b) (ppm) (a) (mg/m 3 ) (b) (ppm) (mg/m 3 ) (ppm) (mg/m 3 ) (ppm; v/v) Captafol SK – 0.1 – – SK – 0.1 – – Captan – 5 – – – 5 – 15 Carbaryl – 5 – – – – – – Carbofuran – 0.1 – – – 0.1 – – Carbon black – 3.5 – – – 3.5 – 7 Carbon dioxide 5000 9150 30 000 54800 5000 9150 15 000 27 400 0.067 Carbon disulphide SK 10 32 – – SK 10 32 MEL – – 92 Carbon monoxide 25 28 – – 30 35 200 232 0.00050 Carbon tetrabromide 0.1 1.4 0.3 4.1 0.1 1.4 0.3 4 Carbon tetrachloride SK 5 (e) 31 (e) 10 62 SK 2 13 – – 0.052 Carbonyl chloride, see Phosgene Carbonyl fluoride 2 5.4 5 13 – – – – Catechol SK 5 23 – – 5 23 – – 10 (total – 20 inhalable dust) 4–– (respirable dust) Chlordane SK – 0.5 – – SK – – – – Chlorinated camphene SK – 0.5 – 1 – – – – Chlorinated diphenyl oxide – 0.5 – – – – – – Chlorine 0.5 1.5 1 2.9 0.5 1.5 1 2.9 3.2 Chlorine dioxide 0.1 0.28 0.3 0.83 0.1 0.3 0.3 0.9 0.011 Chlorine trifluoride – – C0.1 0.38C – – 0.1 0.38 Chloroacetaldehyde – – C1 3.2C – – 1 3.3 Chloroacetone SK – – C1 C3.8 – – – – α-Chloroacetophenone 0.05 0.32 – – 0.05 0.32 – – 1.4 Chloroacetyl chloride 0.05 0.23 0.15 0.7 – – – – Chlorobenzene 10 – – – 50 234 – – 110 o- Chlorobenzylidene SK – – C0.05 C0.39 – – – – malononitrile Chlorobromomethane 200 1060 – – 200 1060 250 1340 0.50 2-Chloro-1,3-butadiene, see β-Chloroprene Chlorodifluoromethane 1000 3590 – – 1000 3590 – – Chlorodiphenyl (42% chlorine) SK – 1 – – Chlorodiphenyl (54% chlorine) SK – 0.5 – – SK – 0.1 – – 1-Chloro-2,3-epoxy propane, s ee Epichlorohydrin      Cellulose (pure) – 10 – – –       2-Chloroethanol, see Ethylene chlorohydrin Chloroethylene, see Vinyl chloride Chloroform 10 (e) 49 (e) – – 2 9.9 – – 0.12 bis(Chloromethyl)ether 0.001 (g) 0.005 – – 0.001 0.005 – – Chloromethyl methyl ether (e) (e) –– –– –– 1-Chloro-4-nitrobenzene – – – – SK – 1 – 2 1-Chloro-1-nitropropane 2 10 – – – – – – Chloropentafluoroethane 1000 6420 – – 1000 6420 – – Chloropicrin 0.1 0.67 – – 0.1 0.7 0.3 2 0.13 β-Chloroprene SK 10 36 – – – – – – 0.68 3-Chloropropene – – – – 1 3 2 6 2-Chloropropionic acid 0.1 – – – – – – – o -Chlorostyrene 50 283 75 425 – – – – Chlorosulphonic acid – – – – – 1 – – o -Chlorotoluene 50 259 – – 50 264 – – 150 2-Chloro-6-(trichloromethyl)pyridine, see Nitrapyrin Chlorpyrifos – 0.2 – – SK – 0.2 – 0.6 Chromite ore processing (Chromate), – 0.05 (g) –– –– –– as Cr Chromium metal – 0.5 – – – 0.5 – – Chromium (III) compounds, as Cr – 0.5 – – – 0.5 – – Chromium (VI) compounds, as Cr Water soluble – 0.05 (g) –– – 0.05 – – Water insoluble – 0.01 (g) –– Chromyl chloride 0.025 0.16 – – – – – – Chrysene (e) (e) –– –– –– Chrysotile, see Asbestos Clopidol – 10 – – – – – – Coal dust – 2 – – – 2 – – (respirable fraction) (respirable dust) Anthracite – 0.4 – – – – – – Bitumous – 0.9 – – – – – – Coal tar pitch volatiles, as benzene – 0.2 (g) – – – 0.14 – – solubles Cobalt as Co, elemental and inorganic – 0.02 – – – 0.1 – – compounds (cobalt and compounds) Cobalt carbonyl as Co – 0.1 – – – – – – Cobalt hydrocarbonyl as Co – 0.1 – – – – – – Copper Fume – 0.2 – – – 0.2 – – Dusts and mists as Cu – 1 – – – 1 – 2 Cotton dust, raw – 0.2 (l) – – – 2.5 – – Table 5.12 Cont’d Threshold limit values (USA) Occupational exposure limits (UK) Air odour Substance TWA STEL TWA (c) STEL (c) threshold (ppm) (a) (mg/m 3 ) (b) (ppm) (a) (mg/m 3 ) (b) (ppm) (mg/m 3 ) (ppm) (mg/m 3 ) (ppm; v/v) Cresol, all isomers SK 5 22 – – SK 5 22 – – 17 000 (m-cresol) Cristobalite, s ee Silica, crystalline Crocidolite, see Asbestos Crotonaldehyde – – C0.3 – – – – – 17 (trans) Crufomate – 5 – – – – – – Cryofluorane (INN) 1000 7110 – – 1000 7110 1250 8890 Cumene SK 50 246 – – SK 25 125 75 375 570 Cyanamide – 2 – – – 2 – – Cyanides as CN, see Hydrogen cyanide – Cyanogen 10 22 – – 10 22 – – Cyanogen chloride – – C0.3 C0.75 – – 0.3 0.77 Cyclohexane 300 1030 – – 100 350 300 1050 25 Cyclohexanol SK 50 206 – – 50 208 – – 0.15 Cyclohexanone SK 25 100 – – 25 102 100 408 0.88 Cyclohexene 300 1010 – – 300 1020 – – 0.18 Cyclohexylamine 10 41 – – SK 10 41 – – 2.6 Cyclonite SK – 0.5 – – SK – 1.5 – 3 Cyclopentadiene 75 203 – – – – – – 1.9 Cyclopentane 600 1720 – – – – – – Cyhexatin – 5 – – – 5 – 10 2,4-D – 10 – – – 10 – 20 DDT (Dichloro- – 1 – – – 1 – 3 diphenyltrichloroethane) Decaborane SK 0.05 0.25 0.15 0.75 – – – – Demeton SK 0.01 0.11 – – – – – – 0.060 Diacetone alcohol 50 238 – – 50 240 75 362 0.28 Dialkyl 79 phthalate – – – – – 5 – – Diallyl phthalate – – – – – 5 – – 2,2′-Diaminodiethylamine – – – – SK 1 4 – – 1,2-Diaminoethane, s ee Ethylenediamine Diammonium peroxydisulphate – – – – – 1 – – as S 2 O 8 Diatomaceous earth, see Silica, amorphous Diazinon SK – 0.1 – – SK – 0.1 – 0.3 Diazomethane 0.2 (e) 0.34 – – carcinogen – – – Diborane 0.1 0.11 – – 0.1 0.1 – – 2.5 Dibromodifluoromethane – – – – 100 872 150 1310 1,2-Dibromoethane, see Ethylene dibromide 2- N -Dibutylamino-ethanol SK 0.5 3.5 – – – – – – Dibutyl phenyl phosphate SK 0.3 3.5 – – – – – – Dibutyl phosphate 1 8.6 2 17 1 8.7 2 17 Dibutyl phthalate – 5 – – – 5 – 10 6,6′-Di-tert-butyl-4-4′-–––––10–20 thiodi- m -cresol Dichloroacetylene – – C0.1 C0.39 – – 0.1 0.4 o -Dichlorobenzene SK 25 152 50 153 – – 50 306 0.30 p -Dichlorobenzene 10 31 – – 25 153 50 306 0.18 3-3′-Dichlorobenzidine – (e) –––– – – – 1,4-Dichloro-2-butene 0.005 (e) ––– –––– Dichlorodifluoromethane SK 1000 4950 – – 1000 5030 1250 6280 1,3-Dichloro-5,5-dimethyl hydonton – 0.2 – 0.4 – 0.2 – 0.4 1,1-Dichloroethane – – – – 200 823 400 1650 1,2-Dichloroethane, see Ethylene dichloride 1,1-Dichloroethylene see Vinylidene chloride 1,2-dichloroethylene 200 793 – – 200 806 250 1010 17 (trans) Dichloroethyl ether SK 5 29 10 58 – – – – 0.049 Dichlorofluoromethane 10 42 – – 10 43 – – Dichloromethane 50 175 – – 100 350 MEL 300 1060 1,1-Dichloro-1-nitroethane 2 12 – – – – – – 2,2′-Dichloro-4-4′-methylene – – – – SK – 0.005 MEL – – dianiline (Mb OCA) Dichlorophenoxyacetic acid, see 2,4-D 1,2-Dichloropropane, see Propylene dichloride Dichloropropene SK 1 4.5 – – SK 1 5 10 50 2,2-Dichloropropionic acid – 5 – – – – – – Dichlorotetrafluoro-ethane, see Cryofluorane Dichlorvos SK – 0.90 – – SK 0.1 0.92 0.3 2.8 Dicrotophos SK – 0.25 – – – – – – Dicyclohexyl phthalate – – – – – 5 – – Dicyclopentadiene 5 27 – – 5 27 – – 0.0057 Dicyclopentadienyl iron, see Ferrocene Dieldrin SK – 0.25 – – SK – 0.25 – 0.75 Diethanolamine – 2 – – 3 13 – – 0.27 Diethylamine 5 – 25 75 10 30 25 75 0.13 2-Diethylamino-ethanol SK 2 – – – SK 10 49 – – 0.011 Diethylene glycol – – – – 23 100 – – Table 5.12 Cont’d Threshold limit values (USA) Occupational exposure limits (UK) Air odour Substance TWA STEL TWA (c) STEL (c) threshold (ppm) (a) (mg/m 3 ) (b) (ppm) (a) (mg/m 3 ) (b) (ppm) (mg/m 3 ) (ppm) (mg/m 3 ) (ppm; v/v) Diethylene triamine SK 1 4.2 – – SK 1 4.3 – – Diethyl ether, see Ethyl ether Di(2-ethylhexyl)phthalate, see Di-sec-octyl phthalate Diethyl ketone 200 716 300 1024 200 716 250 895 2.0 Diethyl phthalate – 5 – – – 5 – 10 Diethyl sulphate – – – – 0.05 0.32 – – Difluorodibromomethane 100 858 – – 100 860 150 1290 Diglycidyl ether (DGE) 0.1 0.53 – – 0.1 0.5 – – Dihydroxybenzene, see Hydroquinone Diisobutyl ketone 25 145 – – 25 148 – – 0.11 Diisoctyl phthalate – – – – – 5 – – Diisodecyl phthalate – – – – – 5 – – Diisononyl phthalate – – – – – 5 – – Diisopropylamine SK 5 21 – – 5 21 – – 1.8 Diisopropyl ether, see Isopropyl ether Dimethoxymethane, see Methylal Dimethyl acetamide SK 10 36 – – SK 10 36 20 72 47 Dimethylamine 5 9 15 27 2 3.8 6 11 0.34 Dimethylaminobenzene, see Xylidene Dimethylamino ethanol – – – – 2 7.4 6 22 Dimethylaniline SK 5 25 10 50 SK 5 25 10 50 0.013 ( N,N -Dimethylaniline) Dimethylbenzene, see Xylene 1,3-Dimethylbutyl acetate – – – – 50 300 100 600 Dimethyl carbamoyl chloride (e) (e) –– –– –– Dimethyl-1,2-dibromo-2,2-dichloroethyl phosphate, see Naled Dimethyl ether – – – – 400 766 500 958 N - N -Dimethylethylamine – – – – 10 30 15 45 Dimethylethoxy silane 0.5 – 1.5 – – – – – Dimethylformamide SK 10 30 – – SK 10 30 20 60 2.2 2,6-Dimethyl-4-heptanone, see Diisobutyl ketone 1,1-Dimethyl hydrazine SK 0.01 (e) – – – – carcinogen – – 1.7 Dimethylnitrosoamine, see N -Nitrosodimethylamine Dimethylphthalate – 5 – – – 5 – 10 Dimethyl sulphate SK 0.1 (e) 0.52 (e) – – SK 0.05 0.25 – – Dinitolmide – 5 – – – – – – Dinitrobenzene (all isomers) SK 0.15 1 – – SK 0.15 1 0.5 3 Dinitro- o -cresol SK – 0.2 – – SK – 0.2 – 0.6 1,2-Dinitroethane, see Ethylene glycol dinitrate 1,2-Dinitropropane – – – – SK – – – – 3,5-Dinitro- o -toluamide, see Dinitolmide Dinitrotoluene SK – 0.2 – – SK – carcinogen – – Di-nonyl phthalate – – – – – 5 – – Dioxane SK 20 – – – SK 25 90 100 366 24 Dioxathion SK – 0.2 – – SK – 0.2 – – Diphenyl, see Biphenyl Diphenylamine – 10 – – – 10 – 20 Diphenyl ether (vapour), see Phenyl Ether Diphenylmethane diisocyanate, see Isocyanates; Methylene bisphenyl isocyanate Diphosphorus pentoxide – – – – – – – 2 Dipotassium peroxydisulphate, – – – – – 1 – – as S 2 O 8 Dipropylene glycol methyl ether SK 100 606 150 909 – – – – Dipropyl ketone 50 233 – – – – – – Diquat – 0.5 – – – 0.5 – 1 Di-sec-octyl phthalate – 5 – – – 5 – 10 Disodium disulphite – 5 – – – 5 – – Disodium peroxydisulphate, – – – – – 1 – – as S 2 O 8 Disodium tetraborate anhydrous – – – – – 1 – – decahydrate – – – – – 5 – – pentahydrate – – – – – 1 – – Disulfiram – 2 – – – – – – Disulfoton – 0.1 – – – 0.1 – 0.3 Disulphur dichloride – – C1 – – – 1 5.6 Diuron – 10 – – – 10 – – Divinyl benzene 10 53 – – 10 54 – – Dusts (S) 10 (total inhalable dust) 4–– (respirable dust) Endosulfan SK – 0.1 – – SK – 0.1 – 0.3 Endrin SK – 0.1 – – SK – 0.1 – 0.3 Enflurane 75 566 – – 50 383 – –      Emery – 10 (i) –– – [...]... – 0 .5 50 SK – 25 SK 25 SK 50 15 50 20 0 25 1 100 50 – – – 0.01 24 2 – – 5 0.09 100 – C0 .2 – 0.03 483 – – – 0 .27 – – – 3 (respirable dust) SK      – – – – 0.01 – – 0.0 05 – – 0.08 600 – 25 0 – 300 0 .2 150 – 899 1 .5 3 75 23 7 – 12 237 106 20 8 100 – – 100 40 100 4 75 – – 4 75 170 416 – 1 20 8 0 .2 1 25 100 20 5 60 150 716 103 6.3 491 – – 100 – 25 40 100 25 75 25 0 75 5 150 – – 416 0.6 1 25 170 416 100 22 5 8 95 309... 450 4 – – 75 – – – 50 0 .5 1 – – 40 5 50 350 0 .2 400 50 50 – – 0.0 05 – 100 – – – – – 328 19 .5 – – – – – – 40 20 7 24 60 18 – – 344 – – – SK SK SK SK SK SK – 15 20 1 0. 0 25 61 72 2.8 – 25 40 – – 1 02 143 – – – 5 5 50 2. 5 10 16 MEL 24 MEL 308 – – – – – – – – – – SK 100 50 20 0 – – 3 75 27 4 616 – – 300 150 25 0 – – 1 120 822 770 – – 10 – 1000 20 0 10 36 – 3160 26 6 13 – – 1 25 0 25 0 – – – 3 950 333 – 50 0 .5 5 100 50 ... 50 100 150 50 – – 50 – – 0.0 05 25 25 0 400 5 2 – 25 0 – 0 .5 2 0.86 – 1 .5 – 2. 6 – 1 – 2 – – 1 0. 05 10 – SK 0 .5 10 – – 0.6 – 0.01 – 50 100 150 50 SK – 50 50 50 – see Isocyanates – – SK 400 – – 1 25 0 – 0 .5 5 – 1.4 0.17 14 2 10 8 MEL 10 –    3 5 11 – – 3 2 – 15 – 2. 7 – 48 15 0.1 – – 0.1 9.8 1 5 – 0.08 – 1 – 27 0 100 366 1 25 724 187 154 75 0. 02 MEL – 383 – 27 0 – 27 0 100 – 5 – – 999 – – 5 1060 2 0.87 – 20 0... 26 6 13 – – 1 25 0 25 0 – – – 3 950 333 – 50 0 .5 5 100 50 25 SK 5 50 20 0 – – 50 SK 50 – SK – see Isocyanates SK SK (d) 23 7 2. 2 20 366 27 0 92 20 1 05 1110 – – 23 7 23 3 – 0 .2 100 – 15 1 25 100 75 – 100 400 0.3 – 75 75 – – 4 75 – 60 458 54 1 27 5 – 21 0 22 20 1.4 – 356 350 – 0.6 0. 45 2. 3 – 4.6 50 0.0048 7.0 100 3 .2 0. 35 1.7 0.076 120 2. 2 630 50 0 (cis) Table 5. 12 Cont’d Threshold limit values (USA) TWA STEL (ppm)(a)... demeton 2- Methyl-4,6-dinitrophenol Methylene bisphenyl isocyanate (MDI) Methylene chloride, see Dichloromethane) – 15 20 – SK SK – – 5 5 – 0. 0 25 60 70 – – 25 – (d) 2. 5 10 16 24 – – – – – – – – – – – 150 – 25 0 – 1 25 0 56 0 – 757 – 20 50 100 – 20 0 1000 1000 SK SK SK SK SK SK SK SK 3 75 – 606 1640 1640 2 1 1000 20 0 5 7 2. 7 3110 26 2 6 .5 – – – 25 0 15 23 3 2. 2 4 – – – 20 103 1910 1 1610 23 4 22 9 0 .5 – 0. 051 – –... 0.11(e) – – 0.0 05 SK 0. 054 – – Air odour threshold (ppm; v/v) see Isocyanates – 0.1(e) 20 0 – 100 0.81(e) 59 0 – 24 6 – 300 C0 .2 150 – 8 85 – 368 0.01 20 0 – 100 – 0.1 2( e) 50 25 50 0. 02 200 0 .5 50 – – – – – – 20 0 – 1 – – – 12( e) 23 4 104 20 5 0.047 7 05 0.98 20 8 0 .2 – – – – – 7 05 – 6.3 – – – – – 40 75 – – – 100 – – – – – – 25 0 – – – – – – – 167 307 – – – 416 – – – – – – 881 – – – 50 – SK 2 50 SK 25 SK 50 see Isocyanates... 0 .5 2 849 50 0 999 – 15 – – 25 0 25 0 50 0 – 46 2 6 1060 6 25 1 25 0 347 – 110 – 50 8 – – – 40 – – 1 72 (d) – – SK – – (e) SK SK 16 000 (e) 0 .5( e) 10 – – 20 0 20 0 – 75 0. 05 (e) (d) SK SK – 0 .2 – 1.4 – 0 .2 – 1.4 – – – – – – 3 0.16 0.67 2. 6 76 0 . 25 7 20 25 SK Air odour threshold (ppm; v/v) 4.7(e) 48 107 1 2. 3 – – – – – – – – – 5 – – – – – – – – – – – – 10 4 5 – – – – – – – 10 – 5 16 – – 5 16 10 33 – 5 – SK 1 – 12. .. (IGE), see 2, 3-Epoxypropyl isopropyl ether Kaolin Ketene – – – – C3 C5 C9.9 C7 .5 – – – – – 1 0. 05 10 – C4.7 – – – – 1.4 0.16 14 2 – – – – C3 – – 15 – – C5 C5 C5 – – – 21 – 0 .5 10 – – 0.6 2. 8 48 0.1 – 10 5 0 .23 1 26 6 361 713 1 52 – – 26 6 – – 0.0 45 106 1040 983 12 11 – 1040 – – – C0.1 – – 0 .2 – 100 1 25 – – – – – – C5 – – 310 50 0 10 – – 310 – – – – – – 0. 45 – 5 32 4 52 – – – – – – C28 – – 129 0 123 0 24 – – 1300... see 2- Methoxyethyl acetate Ethylene oxide Ethylene imine 0 .5 – Occupational exposure limits (UK) TWA(c) STEL(c) 3 (ppm) (mg/m ) (ppm) (mg/m3) SK SK 3 – 10 10 400 5 1000 2 25 100 20 0 – 50 1000 1 – – 10 0 .5 5 – 0 .2 5 1.9 – 24 0 (d) 1 .5 – 75 5.8 – 0.93 360 120 000 7.6 – 37 MEL 54 MEL 1460 20 1 920 3.8 133 441 906 – 23 7 27 00 4.4 – 6 – – – – 15 – 6 – 1 25 25 0 – 100 1 25 0 – – 15 – – – – 60 – 11 – 5 52 1130 – 4 75. .. 0.1 25 1 25 – 10 0 .5 0.1 – 3 5 1 56 6 15 63 – – 15 – 5 – 37 – 29 – – – – – – – 150 0.48 0.00044 0 .55 0.00010 – 0.3 – 6 10 3 850 – 0.6(g) – 0 .2 – 0.6 – – – – – – – – – 15 – 52      – – – 10 0 .5( e) 1(g) SK 42 2 .2( e) 2. 6(g) – – – – 5 7(l) 0.1 1(e) 0.6 – – – – – – 0 .5 (total inhalable dust) – 0.04 (Fume and respirable – dust) as V – – 36 20 20 – MEL – 0. 028 – – – 72 – – – – – – 0 .50 3000 Table 5. 12 Cont’d . – – 1000 1 920 – – 84 Ethylamine 5 9 – – 2 3.8 6 11 0. 95 Ethyl amyl ketone 25 131 – – 25 133 – – 6.0 Ethyl benzene 100 441 1 25 5 52 100 441 1 25 5 52 2.3 Ethyl bromide 5 – – – 20 0 906 25 0 1130 3.1 Ethyl. (ppm; v/v) Acetaldehyde – – C 25 – 20 37 50 92 2000 Acetic acid 10 25 15 37 10 25 15 37 21 Acetic anhydride 5C – – – 0 .5 0.1 2 0.4 39 Acetone 50 0 – 750 – 750 1810 150 0 3 620 57 Acetone cyanohydrin –. 25 0 n -Butyl acetate 150 713 20 0 950 150 724 20 0 966 390 sec-Butyl acetate 20 0 950 – – 20 0 966 25 0 121 0 tert-Butyl acetate 20 0 950 – – 20 0 966 25 0 121 0 Butyl acrylate 2 – – – 10 53 – – 29 0 n -Butyl alcohol