... ISO9001, is a leading manufacturer & exporter of Calcium Carbide (295L/Kg, 50-80mm/25-50/15-25/4-15mm, 100kg/ 50kg new steel drums ... when its purity is higher, the specific gravity is 2.22(18), melting point is 2300, the product can absorb water in the air and ... conduct electricity. They higher its purity is, the easier it conducts ...