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.
Flammability Limits in air
Gas @ 70°F(21.1°C),