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preface to fifteenth edition

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11.128 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 />

Perfluoroace<strong>to</strong>ne 0.1<br />

Phenol 5 19<br />

p-Phenylenediamine 0.1<br />

Phenylhydrazine 0.1 carcinogen<br />

Phosgene 0.1 0.4 highly <strong>to</strong>xic<br />

Phosphine 0.3 0.4 highly <strong>to</strong>xic<br />

Phosphoric acid 1<br />

Phosphorus pentachloride 1<br />

Phosphorus pentafluoride<br />

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

Phosphorus pentasulfide 1<br />

Phosphorus trichloride 0.5 3<br />

Phosphoryl chloride 0.1<br />

Phthalic anhydride 1 6<br />

Picric acid—skin 0.1<br />

Propane 1000 1800 low <strong>to</strong>xicity<br />

Propanoic acid 10 30<br />

1-Propanol 200 500<br />

2-Propanol 400 980<br />

Propenal 0.1<br />

Propenenitrile 2 carcinogen<br />

Propenoic acid 2<br />

Propyl acetate 200 835<br />

Propyleneimine 2 5 carcinogen<br />

Propylene oxide 100 240 <strong>to</strong>xic<br />

Propyl nitrate 25 110<br />

Propyne 1000 1650<br />

2-Propyn-1-ol 1 2.3<br />

Pyridine 5 15<br />

Quinone 0.1 0.4<br />

Selenium compounds (as Se) 0.2<br />

Selenium hexafluoride 0.05 0.4<br />

Silane 5 7 highly <strong>to</strong>xic<br />

Silicon tetrafluoride<br />

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

Stibine 0.1<br />

S<strong>to</strong>ddard solvent 100 575<br />

Strychnine 0.15<br />

Styrene 50 213 carcinogen<br />

Sulfur dioxide 2 highly <strong>to</strong>xic<br />

Sulfur hexafluoride 1000 6000 low <strong>to</strong>xicity<br />

Sulfuric acid 1<br />

Sulfur monochloride 1 6<br />

Sulfur pentafluoride 0.01<br />

Sulfur tetrafluoride 0.1 0.4<br />

Sulfuryl fluoride 5 20 highly <strong>to</strong>xic<br />

Tellurium hexafluoride 0.02 0.2<br />

Terphenyls 1 9<br />

1,1,2,2-Tetrabromoethane 1 14

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