1 white powder, insoluble in water, but dissolved in acid 2 content: 97% 3 industrial grade Specifications: CaCO3 content 97% Analysis: ( for reference only)Fat content 0.5%max Insoluble in hydrochloric acid 0.3%max Moisturre 0.3%max Bulk density, ml/g 2min Uses:Mainly used as rubber sizings or as filler for making imitation leather, wire, PVC, paint, printing ink and paper, etc.