1:Calcium Carbide best price in china 20-50 2:ISO9001:2000 CIQ SGS 3:2012 best price in China 4:Free sample MSDS COA HOT Size , mmWithin the limit of the size %2.5mm Siftage, %Ash,%80-200≥85≤5≤150-80≥85≤5≤125-50≥85≤5≤14-25≥85≤5≤1Property: Grey, brown or black solid, purple when its purity is higher, the specific gravity is 2.22(18), melting point is 2300, the product can absorb water in the air ...