Calcium_carbonate
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Calcium_carbonate

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Calcium carbonate is a chemical compound with the chemical formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skeletons and pearls. Materials containing much calcium carbonate or resembling it are described as calcareous. Calcium carbonate is the active ingredient in agricultural

* Calculated from Wikipedia data.
Accuracy is not guaranteed.

Calcium carbonate
Names
IUPAC name
Calcium carbonate
Other names
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.006.765 Edit this at Wikidata
EC Number
  • 207-439-9
E number E170 (colours)
KEGG
RTECS number
  • FF9335000
UNII
  • InChI=1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
    Key: VTYYLEPIZMXCLO-UHFFFAOYSA-L
  • InChI=1/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
    Key: VTYYLEPIZMXCLO-NUQVWONBAS
  • [Ca+2].[O-]C([O-])=O
  • C(=O)([O-])[O-].[Ca+2]
Properties
CaCO3
Molar mass 100.0869 g/mol
Appearance Fine white powder or colorless crystals; chalky taste
Odor odorless
Density 2.711 g/cm (calcite)
2.83 g/cm (aragonite)
Melting point 1,339 °C (2,442 °F; 1,612 K) (calcite)
825 °C (1,517 °F; 1,098 K) (aragonite)
Boiling point decomposes
0.013 g/L (25 °C)
3.3×10
Solubility in dilute acids soluble
−3.82×10 cm/mol
1.59
Structure
Trigonal
32/m
Thermochemistry
93 J/(mol·K)
−1207 kJ/mol
Pharmacology
A02AC01 (WHO) A12AA04 (WHO)
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
0
0
Lethal dose or concentration (LD, LC):
6450 mg/kg (oral, rat)
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 15 mg/m (total) TWA 5 mg/m (resp)
Safety data sheet (SDS) ICSC 1193
Related compounds
Other anions
 Calcium bicarbonate
Other cations
Related compounds
 Calcium sulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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