... ,heavy putting down and colliding are not allowed to avoid the spark leads to explosion.Property: Grey, brown or black solid, ... synthesis industry, Acetylene obtanied from calcium carbide is raw material to make ethylene, chloroprene rubber, calcium cyanamide, acetic acd, acetaldehydr, ... new iron drums. Used in the generation of acetylene gas for welding, and as a reagent,Calcium Carbide