Sodium sulfate, decahydrate

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Colorless, crystalline solid. Hydrated sodium sulfate occurs in nature as the mineral mirabilite. In the 17th century it was called Glauber's salt after a German chemist, Johann Glauber who extracted it from Hungarian spring water. Sodium sulfate is used in the manufacture of Kraft paper, Paperboard, Glass, synthetic ultramarine blue, and ceramic Glaze. It is also used as a leveling agent in dyeing textiles to ensure even color acceptance.

Synonyms and Related Terms

sodium sulfate, hydrated; sodium sulfate crystals; mirabilite; Glauber's salt; sal mirabile; crazy water crystals



Hazards and Safety

  • Nonflammable.
  • ThermoFisher Scientific: SDS

Physical and Chemical Properties

Soluble in water, glycerol. Insoluble in ethanol.

Composition Na2SO4 - 10H2O
CAS 7727-73-3
Melting Point 33 C
Density 1.464 g/ml
Molecular Weight mol. wt. = 322.17

Resources and Citations

  • Grossi, "Acoustic emission monitoring to study sodium sulfate crystallization in monumental porous carbonate stone" Studies in Conservation 42 (1997), p. 115-125.
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 785
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Dictionary of Paper, American Paper Institute, New York, Fourth Edition, 1980
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8829
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
  • John and Margaret Cannon, Dye Plants and Dyeing, Herbert Press, London, 1994
  • Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985