... & 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 ... , can dissolve in the diluted acid and the sodium hydroxide.Usage: Used as the light apocrustic and the latex ...