... dissolves in water, turns into acetylene and calcium hydroxide and releases heat.Use: Calcium carbide is an important basic material in organic ... raw material to make ethylene, chloroprene rubber, calcium cyanamide, acetic acd, acetaldehydr, ethylacetate, cyanide acetate, dicyandiamide, acetone, octanol, trichloride ethylene etc. ... of acetylene gas for welding, and as a reagent,Calcium Carbide