1 mm Hg at 1492 deg C Almost silver-white, lustrous soft, very malleable & ductile metal; highly crystalline; odorless. Generally considered to be of low toxicity B-5
Physical and Chemical Properties of Selected Chemicals and Compounds Used in Photovoltaic Cells B-6 Chemical CAS Molecular Weight (g/mol) Water Solubility Vapor Pressure Description Comments Titanium tetrachloride Absorbs moisture from air; decomposed by hot water. 7550-45-0 189.73 Soluble in cold water 10 mm Hg at 20 deg C; 9.6 mm Hg at 22 deg C Colorless or light yellow liquid; penetrating acid odor; corrosive. Toluene 108-88-3 92 526 mg/L Flammable, refractive liquid; benzene-like odor LD50 (orally) in rats - 7.53 g/kg Trichloroethylene 79-01-6 131 0.11 g/100 g of water at 25 deg C Nonflammable mobile liquid; odor resembling that of chloroform Slowly decomposed by light in the presence of moisture; LD50 (orally) in rats - 4.92 ml/kg; LC (4 hrs) in rats - 8000 ppm 1,1,1-Trichloroethane 71-55-6 133 1330 mg/L Nonflammable liquid Absorbs some water Trichlorosilane 10025-78- 2 135.45 Decomposed by water 400 mm Hg at 14.5 deg C Volatile, mobile liquid LD50 (oral) in rats - 1.03 g/kg; fumes in air Trimethyl gallium 1445-79-0 114.82 221.8 mm Hg at 25 deg C; 64.5 mm Hg at 0 deg C Fire risk as it may ignite spontaneously in air. Vinyl acetate Possibly carcinogenic to humans (Group 2B) 108-05-4 86.09 20,000 mg/l @ 20 deg C 90.2 mm Hg at 20 deg C Clear, colorless, mobile liquid. Initially pleasant odor which quickly becomes sharp and irritating. Zinc 1 mm Hg at 487 deg C; 400 mm Hg at 844 deg C 7440-66-6 65.38 Bluish-white lustrous metal, distorted hexagonal closepacked structure Fair conductor of electricity Zinc phosphide 1314-84-7 258.12 Insoluble in water Zero (in the dry state) Dark gray tetragonal crystals, lustrous or dull powder; faint phosphorus odor LD50 (oral) in rats - 40.5-46.7 mg/kg; reacts violently with H 2 SO 4 , HNO 3 , and other oxidizing agents; used in rat and mice poisons
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