General Characteristics Boron Trichloride is a colorless, corrosive, nonflammable toxic gas with an irritating, acrid odor. It forms dense fumes in humid air. Boron Trichloride is irritating to the mucous membranes. It hydrolyses in moist air to form hydrogen chloride. It is shipped as a liquefied gas under its own vapor pressure.   Physical Properties Molecular Weight 117.17 Flammability Limits in air Nonflammable Specific Gravity, Gas @ 70°F(21.1°C), 1 atm(Air=1) 4.04 Density, Gas @ 70°F(21.1°C), 1 atm 0.303lbs/ft^3 (4.85g/ml) Density, Liquid @ 0°C, 85.8lbs/ft^3 (1.373g/ml) Specific Volume, Gas @ 70°F(21.1°C), 1 atm 3.3ft^3/lb (206ml/g) Boiling Point @ 1 atm 54.5°F (12.5°C) Melting Point @ 1 atm -161.1°F (-107.3°C) Critical Temperature 353.8°F (178.8°C) Toxicity TLV-TWA 5 ppm LC50 2541 ppm

<more detail>