Zinc carbonate
CAS 3486-35-9
EC 222-477-6
Formula CH2O3.Zn
MW 125.4 g/mol
Salts & Minerals Pharmaceuticals & HealthcarePersonal Care & CosmeticsWater TreatmentMining & MetalsCoatings, Adhesives, Sealants & Elastomers CatalysispH Regulation & BufferingPreservation & Biocide
Description
Zinc carbonate (CAS 3486-35-9, EC 222-477-6) is an inorganic zinc salt also known as Smithsonite, Zincspar, and C.I. 77950 (CI 77950). It carries no assigned E-code and is commercially supplied as a white crystalline powder under the formula CH2O3.Zn.
In personal care formulations, zinc carbonate acts as a skin protectant and mild antimicrobial by releasing zinc ions that disrupt microbial cell membranes while buffering skin pH. In coatings and rubber compounding, it functions as a catalyst and activator, accelerating crosslinking reactions. Water treatment applications exploit its buffering capacity to stabilise process pH within defined operating ranges.
Zinc carbonate is available in technical and cosmetic-grade forms, with supply subject to REACH registration requirements for EU market compliance. Pharmaceutical-grade material can be sourced to Ph.Eur. specifications where required. Standard packaging includes 25 kg bags and bulk quantities; buyers should confirm grade suitability against their specific regulatory and formulation requirements.
In personal care formulations, zinc carbonate acts as a skin protectant and mild antimicrobial by releasing zinc ions that disrupt microbial cell membranes while buffering skin pH. In coatings and rubber compounding, it functions as a catalyst and activator, accelerating crosslinking reactions. Water treatment applications exploit its buffering capacity to stabilise process pH within defined operating ranges.
Zinc carbonate is available in technical and cosmetic-grade forms, with supply subject to REACH registration requirements for EU market compliance. Pharmaceutical-grade material can be sourced to Ph.Eur. specifications where required. Standard packaging includes 25 kg bags and bulk quantities; buyers should confirm grade suitability against their specific regulatory and formulation requirements.
Physical Properties
| 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] |
Safety & Handling (Learn More)
Warning GHS09
H
H400H410H411
P
P273P391P501
Other Names
ci77950zincsparc.i.77950C.I. 77950Smithsonitecarbonuredezinc
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Derivatives
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