Calcium silicate

For the metasilicate, see Calcium metasilicate.
Calcium silicate
Names
Preferred IUPAC name
Calcium silicate
Systematic IUPAC name
Dicalcium silicate
Other names
  • Belite
  • Calcium monosilicate
  • Calcium hydrosilicate
  • Calcium metasilicate
  • Calcium orthosilicate
  • Micro-cell
  • Silene
  • Silicic acid calcium salt
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.014.282 Edit this at Wikidata
EC Number
  • 235-336-9
E number E552 (acidity regulators, ...)
KEGG
MeSH Calcium+silicate
UNII
  • InChI=1S/2Ca.O4Si/c;;1-5(2,3)4/q2*+2;-4 ☒N
    Key: JHLNERQLKQQLRZ-UHFFFAOYSA-N ☒N
  • [Ca++].[Ca++].[O-][Si]([O-])([O-])[O-]
Properties
Ca2O4Si
Molar mass 172.237 g·mol−1
Appearance White crystals
Density 2.9 g/cm3 (solid)[1]
Melting point 2,130[2] °C (3,870 °F; 2,400 K)
0.01% (20 °C)[1]
Thermochemistry
84 J/(mol·K)[3]
−1630 kJ/mol[3]
Pharmacology
A02AC02 (WHO)
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Irritant
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 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
2
0
0
Flash point Not applicable
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)[1]
REL (Recommended)
 TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)[1]
IDLH (Immediate danger)
 N.D.[1]
Safety data sheet (SDS) [4]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Calcium silicate can refer to several silicates of calcium including:

This article focuses on Ca2SiO4, also known as calcium orthosilicate. It is also referred to by the shortened trade name Cal-Sil or Calsil. All calcium silicates are white free-flowing powders. They are components of important structural materials because they are strong, cheap, and nontoxic.

  1. ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0094". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ R. B. Heimann, Classic and Advanced Ceramics: From Fundamentals to Applications, Wiley, 2010 ISBN 352763018X
  3. ^ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A21. ISBN 978-0-618-94690-7.
  4. ^ "SDS Sheet Library". BNZ Materials. Archived from the original on 2012-03-04. Retrieved 2017-07-19.