DISILANE Si2H6
General Characteristics
Disilane is a noncorrosive, colorless, gas which is spontaneously flammable in air. It decomposes slowly at room temperature to monosilane and hydrogen. It is compatible with hydrogen, argon, helium, and nitrogen, and is often shipped as a mixture with these gases, as well as in pure form.
Physical Information
Molecular Weight
62.22
Flammability Limits in air
Pyrophoric
Specific Gravity,
Gas @ 70&degF(21.1&degC),
1 atm(Air=1)
2.35
Density,
Gas @ 59&degF(15&degC), 41 atm
0.49lbs/ft^3 (7.9g/l)
Specific Volume,
Gas @ 59&degF(15&degC), 41 atm
2.04 ft^3/lb (0.127l/g)
Liquid Density @ Boiling Point
56.25lb/ft^3(901g/l)
Boiling Point @ 1 atm
6.3&degF (-14.3&degC)
Freezing Point @ 1 atm
-206.7&degF (-132.6&degC)
Critical Temperature
303.53&degF (150.85&degC)
Critical Pressure
746.8 psia (73.83 bar)
Toxicity
TLV-TWA
None established
recommend using Silane
5 ppm (ACGIH 1991-92)