Molecular formula: Cr2O3 Specific gravity: 5.21 Standard: HG/T2775-96 Index: GB1611—92 Packing: 25kg in woven bag. Uses: Used in the chrome smelt and chromium carbide ,the dyeing agent of porcelain enamel and ceramic ,leatheroid ,structure material ,sunlight fast coating ,abradant, green polish paste ,ink ,catalyst.