calcium carbide CAS:75-20-7 CaC2 calcium carbideCAS:75-20-7CaC2 [Molecular Formula]: CaC2[Molecular weight]: 64.10[Specification]: Grey, brown or black solid, purple when its purity is higher, the specific gravity is 2.22(18°C), melting point is 2300°C, the product can absorb water in the air and conduct electricity. They higher its purity is, the easier it conducts, it dissolves in water, turns ...