Aluminum sodium sulfate

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Colorless crystals or white granules. Aluminum sodium sulfate, or soda alum, is used as a mordant for textile dyeing. It is also used for paper sizing, and as a filler in ceramics, inks, and paints.

Synonyms and Related Terms

aluminum sodium sulphate (Br.); SAS; sodium aluminum sulfate; soda alum; sodium alum

Other Properties

Soluble in water. Insoluble in ethanol.

Composition Al2(SO4)3-Na2SO4-24H2O
Melting Point 61
Density 1.61

Hazards and Safety



  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 378

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