201583&ensp·&enspcalcium carbide was purchased from acros (97+% purity) and preparation for the reaction was performed as shown on figure s4. solvents were dried and purified according to standard procedures. gcms was performed using a shimadzu gc2010ultra coupled to a gcmsqp2010 with an "rtx5ms column" employing helium
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calcium carbide is also an intermediate product in the smelting of calcium–silicon alloy. technical grade calcium carbide is crystallized from the melt and contains ~80% cac 2 and 10% to 15% cao (fig. 19.4). commercial calcium carbide is a grayblack material due to the presence of residual carbon.
calcium carbide has the nominal formula of cac 2 and the molecular weight of 64.0992 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 2.22 g/cc and it melts at 2160 °c with a boiling point (under an inert atmosphere) of 2300 °c where it decomposes.