White solid, specific gravity: 2.13. It deteriorates by absorbing
moisture and carbon dioxide in the air. It is very corrosive
after being damped and soluble in water (emits heat) alcohol
and glycerin.
Gray, yellow and brown or black solid, specific gravity: 2.22.
It will lose luster and appear gray by absorbing moisture in
the air. It is very active, and it can react with many kinds
of gases and liquors under certain temperature. It can react
with water and turn into Acetylene and calcium hydroxide.
