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preface to fifteenth edition

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11.124 SECTION 11<br />

TABLE 11.49<br />

TLV Concentration Limits for Gases and Vapors (Continued)<br />

Maximum allowable<br />

exposure<br />

Substance ppm mg · m 3 Toxicity<br />

Diborane 0.1 0.1<br />

Dibromodifluoromethane 100 860<br />

1,2-Dibromoethane<br />

carcinogen<br />

Dibutyl phthalate 5<br />

Dichloroacetylene 0.1<br />

o-Dichlorobenzene 25 150<br />

p-Dichlorobenzene 10 60 carcinogen<br />

Dichlorodifluoromethane (Freon 12) 1000 4950<br />

1,1-Dichloroethane 100 405<br />

1,2-Dichloroethane 10 40 carcinogen<br />

1,1-Dichloroethylene 5 20 carcinogen<br />

cis-1,2-Dichloroethylene 200 793<br />

trans-1,2-Dichloroethylene 200 793<br />

Dichlorofluoromethane (Freon 21) 10 42<br />

Dichloromethane 50 174 carcinogen<br />

1,1-Dichloro-1-nitroethane 10 60<br />

1,2-Dichloropropane 75 347 carcinogen<br />

1,3-Dichloropropene 1 carcinogen<br />

Dichlorosilane<br />

highly <strong>to</strong>xic<br />

1,2-Dichlorotetrafluoroethane (Freon 114) 1000 7000<br />

Dieldrin 0.25<br />

Diethanolamine 0.46<br />

Diethylamine 5 15<br />

Diethyl ether 400 1210<br />

Diglycidyl ether 0.5 2.8<br />

Diisobutyl ke<strong>to</strong>ne 25 150<br />

Diisopropylamine 5 20<br />

Diiopropyl ether 250 1040<br />

Dimethoxymethane 1000 3110<br />

N,N-Dimethylacetamide 10 35<br />

Dimethylamine 5 9.2 highly <strong>to</strong>xic<br />

N,N-Dimethylaniline 5 25<br />

Dimethyl 1,2-dibromo-2,2-dichloroethylphosphate 3<br />

Dimethyl ether<br />

slightly <strong>to</strong>xic,<br />

anesthetic<br />

1-(1,1-Dimethylethyl)-4-methylbenzene 1 6.1<br />

N,N-Dimethylformamide 10 30<br />

2,6-Dimethyl-4-heptanone 25<br />

1,1-Dimethylhydrazine 0.5 1 carcinogen<br />

Dimethyl phthalate 5<br />

2,2-Dimethylpropane<br />

Dimethyl sulfate 0.1 0.5 carcinogen<br />

Dinitrobenzene 0.15 1<br />

Dinitro-o-cresol 0.2<br />

Dinitro<strong>to</strong>luene 1.5<br />

1,4-Dioxane 25 90 carcinogen<br />

Diphenyl 0.2 1<br />

Diphenyl ether 1 7<br />

Dipropylene glycol methyl ether—skin 100 600<br />

probably anesthetic

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