Zinc carbonate CAS 3486-35-9

Product Name: Zinc Carbonate
English Alias: Zinc monocarbonate; Carbonic acid zinc salt
CAS Number: 3486-35-9
Molecular Formula: ZnCO₃
Molecular Weight: 125.39 g/mol
Appearance: White crystalline powder
Package: 25 kg/bag (paper-plastic composite bag with inner PE liner)

What is Zinc Carbonate？

Zinc Carbonate is an inorganic compound appearing as a white, odorless crystalline powder. It is insoluble in water but soluble in acids, alkalis, and ammonium salt solutions. The compound occurs naturally as the mineral smithsonite. It decomposes upon heating to zinc oxide and carbon dioxide, making it a useful precursor for zinc oxide production. It exhibits good stability under normal storage conditions.

COA (Certificate of Analysis):

Test Item	Test Standard	Test Result
Characters	White powder	Conform
Assay (ZnO)	57.0%	57.5%
Sulfuric acid insoluble	0.02%	0.01%
Free base (Na₂CO₃)	0.1%	0.04%
Chloride	0.004%	0.002%
Nitrogen compounds	0.1%	0.04%
Sulphates	0.03%	0.01%
Iron	0.01%	0.003%
Heavy metal	0.01%	0.005%
Arsenic	0.0005%	0.0003%
Alkali metal and alkaline earth metals	0.6%	0.3%

Application:

Rubber Industry: Activator and reinforcing agent in rubber compounding

Ceramics: Raw material for ceramic glazes and enamels

Paints & Coatings: Corrosion inhibitor and pigment in coatings

Pharmaceuticals: Topical protectant and astringent in medicinal preparations

Animal Nutrition: Zinc supplement in animal feed

Chemical Synthesis: Precursor for other zinc compounds

Safety Profile:

Zinc Carbonate may cause eye irritation. Inhalation of dust may cause respiratory irritation. Use appropriate personal protective equipment including dust mask and safety glasses when handling. Avoid breathing dust. The substance is harmful to aquatic life. For detailed safety information, consult the full Safety Data Sheet (SDS).

Storage Requirements:

Store in a cool, dry, well-ventilated area away from direct sunlight. Keep containers tightly closed and sealed. Maintain storage temperature below 30°C. Relative humidity below 65% recommended. Store away from strong acids.

Transport & Packaging:

Zinc Carbonate is packaged in moisture-proof paper-plastic composite bags with inner polyethylene liner (25 kg net weight per bag). Transport as non-hazardous material under normal conditions. Ensure containers are properly sealed and protected from moisture during transportation. Store away from incompatible materials.