The BEST price & EXCELLENT quality for various grade the Zinc Carbonate 57.5, 57, 56.5. Welcome your enquiries. Specialty supply ZINC CARBONATEThe Zinc Carbonate 57.5%, 57.0%, 56.5%, etc.Molecular Formula: ZnCO3•2Zn(OH)2•H2OMolecular Weight: 324.15Property: White or yellowish fine amorphous powder, smell-less, tasteless. The proportion is 4.42-4.45, does not dissolve in water and alcohol, ...