Sodium alginate

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A colorless or pale yellow powder. Sodium alginate is the sodium salt of Alginic acid. It is used as a food thickener and as an Emulsifier in paints, dyes, and Paper coatings.

See also Algin.

Synonyms and Related Terms

sodium polymannuronate; sodium salt of alginic acid



Physical and Chemical Properties

Soluble in water forming a viscous gel. Insoluble in ethanol, ether and chloroform.

Composition NaC6H7O6
CAS 9005-38-3


  • Combustible.
  • Fisher Scientific: MSDS

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 20
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998