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preface to fifteenth edition

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PRACTICAL LABORATORY INFORMATION 11.129<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 />

Tetrabromomethane 0.1<br />

1,1,1,2-Tetrachloro-2,2-difluoroethane 500 4170<br />

1,1,2,2-Tetrachloro-1,2-difluoroethane 500 4170<br />

1,1,2,2-Tetrachloroethane 1 6.9 carcinogen<br />

Tetrachloroethylene 25 170 carcinogen<br />

Tetrachloromethane 5 31 carcinogen<br />

1,2,3,4-Tetrachloronaphthalene 2<br />

Tetraethyllead (as Pb) 0.100<br />

Tetrafluoromethane<br />

low <strong>to</strong>xicity<br />

Tetrahydrofuran 200 590<br />

Tetramethyllead (as Pb) 0.150<br />

Tetramethylsuccinonitrile 0.5 3<br />

Tetranitromethane 1 8<br />

Thionyl chloride 1<br />

Thiram 5<br />

Toluene 50 188<br />

Toluene-2,4-diisocyanate 0.02 0.14<br />

o-Toluidine (also m-, p-) 2 8.8<br />

Tribromomethane 0.5 5.2<br />

Tributyl phosphate 0.2 2.2<br />

1,2,4-Trichlorobenzene 5<br />

1,1,1-Trichloroethane 350 1910<br />

1,1,2-Trichloroethane 10 55 carcinogen<br />

Trichloroethylene 50 270 carcinogen<br />

Trichlorofluoromethane 1000 5600<br />

Trichloromethane 10 49 carcinogen<br />

1,2,3-Trichloropropane 10 60<br />

1,1,2-Trichlorotrifluoroethane 1000<br />

Tri-o-cresol phosphate (also m-, p-) 0.1<br />

Triethanolamine 0.5<br />

Triethylamine 1<br />

Trifluorobromomethane (Freon 13B1) 1000 6100<br />

1,1,2-Trifluorotrichloroethane 1000 7600<br />

Triiodomethane 0.6<br />

Trimethylamine 5 12 highly <strong>to</strong>xic<br />

1,2,3-Trimethylbenzene 25 123<br />

1,2,4-Trimethylbenzene (pseudocumene) 25 123<br />

1,3,5-Trimethylbenzene (mesitylene) 25 123<br />

Trinitro<strong>to</strong>luene (TNT) 1.5<br />

Triphenyl phosphate 3<br />

Turpentine 100 560<br />

Vinyl acetate 10 35 carcinogen<br />

Vinyl methyl ether<br />

probably anesthetic<br />

Warfarin 0.1<br />

o-Xylene (also m-, p-) 100 434<br />

2,3-Xylidine (also 2,4-, 2,5-, 2,6-, 3,4-, 3,5-) 0.5 2.5

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