Specifications 2012 calcium carbide 1.Purity 90% min 2.Lump:4-25mm / 15-25mm / 25-50mm 3.Export:pakistan/sri lanka 4.Iso9001 2012 calcium carbide 1.Purity 90% min 2.Lump:4-25mm / 15-25mm / 25-50mm 3.Export:pakistan/sri lanka 4.Iso9001 High quality the calcium carbide ; chemistry formula : cac2 , color : black brown ; purity: 80% : size: 4-7 mm , 7-15 mm , 15-25 mm , 25-50 mm , 50-80 mm , 70-100 mm , 80-120 mm ;gas yield:295-305 l/kg ; packing: in 50 gk and 100 kg /net new iron drums. 100kg steel drum