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Approx. 65 / Kg Get Latest PriceAcetylene (C2H2) is the world's most efficient and hottest burning standard welding gas. For producing acetylene, the reaction of calcium carbide (CaC2) with water (H2O) is used, whereas acetylene and lime milk (Ca(OH)2) is generated. We Bosco supply Calcium carbide. of high purity , any sizes to make high purity Acetylene gas.