<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> Calcium carbide is a chemical compound with the chemical formula of Ca C. Its main use industrially is in the production of acetylene and calcium cyanamide . </P> <P> The pure material is colorless, however pieces of technical - grade calcium carbide are grey or brown and consist of about 80--85% of CaC (the rest is CaO (calcium oxide), Ca P (calcium phosphide), CaS (calcium sulfide), Ca N (calcium nitride), SiC (silicon carbide), etc .). In the presence of trace moisture, technical - grade calcium carbide emits an unpleasant odor reminiscent of garlic . </P>

Calcium carbide cac2 is the raw material for the production of acetylene