10131. Zinc Carbonate

Nomenclature

CAS number: 3486-35-9

CO₃Zn; mol wt 125.42.

C 9.58%, O 38.27%, Zn 52.15%.

ZnCO₃.

Occurs in nature as the minerals smithsonite, zincspar. Prepn: Hüttig et al., Monatsh. Chem. 72, 31 (1939).

Rhombohedral structure. Solubility in water at 15° 0.001 g/100 g; sol in dil acids, alkalies, solns of NH₄⁺ salts.

Basic carbonate.

Zinc carbonate hydroxide; zinc subcarbonate.

Variable composition, usually characterized as 3Zn(OH)₂.2ZnCO₃. Occurs as the mineral hydrozincite. Reagent specification: 70% ZnO minimum.

As pigment; manuf of porcelains, pottery, rubber.

Astringent, topical antiseptic.

Astringent, antiseptic, protective (topical). Also used in rations to prevent Zn deficiency diseases.

Astringent