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Description

Zinc Carbonate · CAS 3486-35-9 · ZnCO3. UNII K8290PTQ4F. Density: 4.4 g/cu cm; Density: 4.4 @25 °C; Color Additive Status: 175.300.

Identification

CAS Registry Number	3486-35-9
PubChem CID	19005
Molecular formula	ZnCO3
IUPAC name	zinc carbonate
UNII (FDA)	K8290PTQ4F

Computed Descriptors

Molecular Weight	125.4
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	123.913886
Monoisotopic Mass	123.913886
Topological Polar Surface Area	63.2
Heavy Atom Count	5
Formal Charge	0
Complexity	18.8

Physical & Chemical Properties

Density	4.4 g/cu cm
Density	4.4 @25 °C
Color Additive Status	175.300
Color Additive Status	178.3297

Physical description & handling notes

• Zinc carbonate appears as a white crystalline solid or powder that is insoluble in water. The primary hazard is the threat posed to the environment. Immediate steps should be taken to limit its spread to the environment. Used in pharmaceuticals, to make other zinc compounds, as a feed additive.
• Dry Powder
• White solid; [Hawley] White odorless powder; [MSDSonline]
• WHITE RHOMBIC CRYSTALS
• WHITE, CRYSTALLINE POWDER
• RHOMBOHEDRAL STRUCTURE

Regulatory Status

Regulatory & Food Contact	FDA Substance added to food: NUTRIENT SUPPLEMENT FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS CIR / INCI: Cosmetic ingredients (Zinc Carbonate) -> CIR (Cosmetic Ingredient Review) CIR / INCI: Opacifying
GHS notification summary	20.1% (74 / 369)

GHS Hazard Classification

GHS notification summary	20.1% (74 / 369)
Reported hazard statements	H400 (72.6%), H410 (24.1%), H411 (51.8%)

Documented Uses

• Found in the minerals smithsonite and zincspar; [Merck Index] Used in rubber and plastic products (fire-proofing filler), cosmetics and lotions, pigments, porcelain and pottery, astringents and topical antiseptics, and animal feeds; [HSDB] Used as a sulfide scavenger in muds and to make drugs (ointments and dusting powders); [CHEMINFO]
• Petroleum Production and Refining [Category: Industry]
• Using Disinfectants or Biocides [Category: Clean]
• Farming (Feed Additives) [Category: Industry]
• Ceramics making [Category: Hobbies]
• AS FIRE-PROOFING FILLER FOR RUBBER & PLASTIC COMPOSITIONS EXPOSED TO FLAME TEMPERATURE; IN COSMETICS & LOTIONS; MFR ZINC SALTS; AS FEED ADDITIVE, TOPICAL ANTISEPTIC.

Synonyms

ZINC CARBONATE; 3486-35-9; Zinc monocarbonate; Zincspar; Carbonic acid, zinc salt (1:1); Natural smithsonite; Zinc carbonate (1:1); CI 77950; C.I. 77950; K8290PTQ4F; DTXSID5049817; RefChem:6359; zinc(2+) ion carbonate; DTXCID9029776; 222-477-6; 226-076-7

Frequently Asked Questions

What are the CAS number and molecular formula of Zinc Carbonate?

CAS 3486-35-9; molecular formula ZnCO3; molecular weight — g/mol.

What other names is Zinc Carbonate known by?

ZINC CARBONATE, 3486-35-9, Zinc monocarbonate, Zincspar, Carbonic acid, zinc salt (1:1), Natural smithsonite.

What is the regulatory status of Zinc Carbonate?

Documented regulatory listings: FDA Substance added to food: NUTRIENT SUPPLEMENT; FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS; CIR / INCI: Cosmetic ingredients (Zinc Carbonate) -> CIR (Cosmetic Ingredient Review).

Is Zinc Carbonate classified as hazardous?

20.1% of GHS notifications report no hazard classification (74 of 369).

What are the key physical properties of Zinc Carbonate?

Density: 4.4 g/cu cm; Density: 4.4 @25 °C; Color Additive Status: 175.300; Color Additive Status: 178.3297.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.