Salts & Minerals
REACH
Zinc carbonate
CAS Number
3486-35-9
EC Number
222-477-6
What is Zinc carbonate?
Zinc carbonate (CAS 3486-35-9), also known as Zincspar, is an inorganic zinc salt used in coatings, rubber, and personal care manufacturing.
Where is Zinc carbonate used?
- Coatings and anticorrosive primers: zinc source that stabilizes pH and contributes to substrate protection
- Rubber and elastomer compounding: zinc oxide precursor
- Personal care and cosmetics: mild astringency and odor control
- Water treatment and mining: adjusts pH in process streams and precipitates interfering metal ions
- It functions as a pH buffer and catalyst precursor.
Good to know: Calcining it in-process generates active ZnO for vulcanization without handling the oxide directly during initial stages.
Commercial specifications
- Purity typically 57–60% ZnO equivalent
- Packaging from multi-wall bags to bulk quantities
Other Names (Synonyms)
Zincspar|Carbonic acid, zinc salt (1:1)|Natural smithsonite|CI 77950|K8290PTQ4F
What are the physical properties of Zinc carbonate?
Melting Point decomposes [KIR84]
Density 4.4 g/cm³
Appearance White, crystalline powder. Evolves carbon dioxide at 300C. Soluble in acids, alkalies, and ammonium salt solutions; insoluble in water.
Color White
Form Solid
Water Solubility mol/L solution H2O: 1.64×10?4 (solubility is given at Pco2=0.00032 bar) [KRU93]; soluble dilute acids, alkalies, NH3 solutions [MER06]
How is Zinc carbonate classified and handled safely? Learn More
Warning
GHS09· Environmental Hazard
Hazard Statements
H400 Very toxic to aquatic life
H410 Very toxic to aquatic life with long lasting effects
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements
P273 Avoid release to the environment.
P391 Collect spillage.
P501 Dispose of contents/container in accordance with local regulations.