Calcium carbonate
CAS 471-34-1CCaO3100.09 g/mol
Calcium carbonate is a calcium salt with formula CCaO3. It has a role as a fertilizer, an antacid, a food colouring and a food firming agent. It is an inorganic calcium salt, a calcium salt, a carbonate salt and a one-carbon compound.
IUPAC: calcium carbonate
PubChem
Physical & Chemical Properties
| Melting Point | 1517 to 2442 °F (Decomposes) (NIOSH, 2024) |
| Boiling Point | Decomposes (NIOSH, 2024) |
| Density | 2.7 to 2.95 (NIOSH, 2024) |
| Solubility | 0.001 % (NIOSH, 2024) |
| Vapor Pressure | 0 mmHg (approx) (NIOSH, 2024) |
| pH | pH = 8 to 9 |
| Appearance | Calcium carbonate appears as white, odorless powder or colorless crystals. Practically insoluble in water. Occurs extensive in rocks world-wide. Ground calcium carbonate (CAS: 1317-65-3) results directly from the mining of limestone. The extraction process keeps the carbonate very close to its original state of purity and delivers a finely ground product either in dry or slurry form. Precipitated calcium carbonate (CAS: 471-34-1) is produced industrially by the decomposition of limestone to calcium oxide followed by subsequent recarbonization or as a by-product of the Solvay process (which is used to make sodium carbonate). Precipitated calcium carbonate is purer than ground calcium carbonate and has different (and tailorable) handling properties. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2836
Data: UN Comtrade
Suppliers on Chem-Exchange
No suppliers currently listing Calcium carbonate
List Your ProductsSafety Data Sheets
No SDS documents available
Upload an SDS document