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Substance Name: Calcium sulfate [NF]
RN: 7778-18-9
UNII: E934B3V59H
InChIKey: OSGAYBCDTDRGGQ-UHFFFAOYSA-L

Note

  • A calcium salt that is used for a variety of purposes including: building materials, as a desiccant, in dentistry as an impression material, cast, or die, and in medicine for immobilizing casts and as a tablet excipient. It exists in various forms and states of hydration. Plaster of Paris is a mixture of powdered and heat-treated gypsum.

Molecular Formulas

  • Ca-S-O4
  • Ca.H2-O4-S
  • Ca.O4-S
  • H2-O4-S.Ca

Molecular Weight

  • 136.14
 

Classification Codes

Classification Codes

  • Dental Materials
  • Pharmaceutic Aid (Tablet and Capsule Diluent)

Superlist Classification Codes

  • TWA (15 mg/m3 total dust; 5 mg/m3 respirable fraction)
  • TWA 10 mg/m3 (particulate matter containing no asbestos and < 1% crystalline silica)

Names and Synonyms

Name of Substance

  • Anhydrite
  • Calcium sulfate
  • Calcium sulfate [NF]
  • Gypsum
  • Pigment white 25
  • Plaster of Paris
  • Sulfuric acid, calcium salt

MeSH Heading

  • Calcium sulfate

Synonyms

  • A 30
  • AI3-02330
  • Anhydrous calcium sulfate
  • Anhydrous gypsum
  • Anhydrous sulfate of lime
  • Basic calcium sulfate
  • Calcarea sulphurica 30C
  • Calcium sulfate
  • Calcium sulfate (1:1)
  • Calcium sulfate (CaSO4)
  • Calcium sulfate anhydrous
  • Calcium sulfate, anhydrous
  • Calcium sulfuricum
  • CAS 20
  • Caswell No. 152
  • CCRIS 3666
  • Crysalba
  • Drierite
  • EC 231-900-3
  • EINECS 231-900-3
  • EPA Pesticide Chemical Code 005602
  • Franklin Fiber H 45
  • GIBS
  • Gypsum
  • HSDB 902
  • Karstenite
  • Muriacite
  • Natural anhydrite
  • NSC 529649
  • Oparex 10
  • Osteoset
  • Satin White
  • SSS-A
  • Sulfuric acid, calcium salt (1:1)
  • Surfuric acid calcium(2+) salt (1:1)
  • Terra alba
  • Thiolite
  • UNII-E934B3V59H

Systematic Names

  • Calcium sulfate
  • Calcium sulphate, natural
  • Sulfuric acid, calcium salt (1:1)

Superlist Names

  • Calcium sulfate
  • Plaster of Paris, anhydrite

Registry Numbers

CAS Registry Number

  • 7778-18-9

FDA UNII

  • E934B3V59H

Other Registry Numbers

  • 1314087-18-7
  • 1428662-16-1
  • 146522-67-0
  • 151621-69-1
  • 23296-15-3
  • 326855-67-8
  • 871982-24-0
  • 99400-01-8

Related Registry Numbers

  • 10034-76-1 (1:1 salt, hemi-hydrate)
  • 10101-41-4 (1:1 salt, di-hydrate)

System Generated Number

  • 0007778189

Molecular Formulas

Molecular Formulas

  • Ca-S-O4
  • Ca.H2-O4-S
  • Ca.O4-S
  • H2-O4-S.Ca

Molecular Formula Fragments

  • Ca
  • COMPONENT
  • H2-O4-S
  • O4-S

Structure Descriptors

InChI

1S/Ca.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2

InChIKey

OSGAYBCDTDRGGQ-UHFFFAOYSA-L

Smiles

S(=O)(=O)([O-])[O-].[Ca+2]