Calcium carbide has the nominal formula of CaC 2 and the molecular weight of g/mol. The pure material is colorless, but most samples have a color ranging from black to grayishwhite, depending on the grade. Its density is g/cc and it melts at 2160 °C with a boiling point (under an inert atmosphere) of 2300 °C, where it main use industrially is in the production of ...