SILICON TETRACHLORIDE SiCl4
General Characteristics
Silicon Tetrachloride is a corrosive, colorless, nonflammable liquid with a suffocating odor. The vapors are irritating to the mucous membranes and form dense fumes when exposed to humid air. It hydrolyses rapidly in moist air, releasing hydrogen chloride. It is shipped as a liquid in special stainless steel containers, capable of delivering either vapor or liquid.
Physical Information
Molecular Weight
169.89
Flammability Limits in air
Nonflammable
Density, Liquid @ 68&degF (20&degC), 1 atm
12.4lb/gal (1.48g/m)
Boiling Point
135.1&degF (57.3&degC)
Melting Point
-93&degF (-69.4&degC)
Triple Point @ 5.11 atm
-69.9&degF (-56.6&degC)
Critical Temperature
453&degF (234.0&degC)
Critical Pressure
543.7 psia (37.6 bar)
Toxicity (as HCl, a 4 to 1 ratio)
PEL /TLV as HCl
5 ppm
LC50
750 ppm

IDLH
100 ppm