... This product is lumpy substance, its surface is a little deep gray, has slight nasty smell. ... synthesis industry, Acetylene obtanied from calcium carbide is raw material to make ethylene, chloroprene rubber, calcium cyanamide ... , acetone, octanol, trichloride ethylene etc. Also used as desulfurizer and dehydrant of steel and for cutting and ... of acetylene gas for welding, and as a reagent,Calcium Carbide