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Calcium silicate

Calcium silicate is the chemical compound Ca2SiO4, also known as calcium orthosilicate and is sometimes formulated as 2CaO·SiO2. It is also referred to by the shortened trade name Cal-Sil or Calsil.

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Further Information

Names

Preferred IUPAC name: Calcium silicate

Systematic IUPAC nameDicalcium silicate

Other names

Belite

Silicic acid calcium salt

Identifiers

CAS Number: 1344-95-2

JSmol: Interactive image

ChemSpider: 14235

ECHA InfoCard: 100.014.282

EC Number: 235-336-9

E number: (acidity regulators, …)

KEGG: D03309

MeSH: Calcium+silicate

PubChem: 14941

UNII: S4255P4G5M

Properties

Chemical formula: Ca2O4Si

Molar mass: 172.24 g·mol

Appearance: White crystals

Density: 2.9 g/cm (solid)3

Melting point: 2,130 °C (3,870 °F; 2,400 K)

Solubility in water: 0.01% (20 °C)

Thermochemistry

Std molar
entropy: 84 J/(mol·K)

Std enthalpy of
formation: −1630 kJ/mol

Pharmacology

ATC code: WHOA02AC02

Hazards

hazards: Irritant

Safety data sheet:

NFPA 704:

Flash point: Not applicable

NIOSH

PEL: TWA 15 mg/m (total) TWA 5 mg/m (resp)33

REL: TWA 10 mg/m (total) TWA 5 mg/m (resp)33

IDLH: N.D.

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).