Sodium acetate

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A colorless, hygroscopic powder. Hydrated sodium acetate is used in photographic emulsions as a Buffer. It is also used as a Mordant for dyeing textiles and as a Preservative in tanning hides.

Synonyms and Related Terms

sodium acetate trihydrate; Natriumacetat (Deut.); acetato de sódio (Port.)

Chemical structure

Sodium acetate.jpg


  • Combustible.
  • Contact may cause irritation.
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in water. Slightly soluble in ethanol. Soluble in ether.

Composition NaC2H3O2
CAS 127-09-3 (anhydrous)
Melting Point 58 C
Density 1.45 g/ml
Molecular Weight mol. wt. = 82.04
Boiling Point 324 C

Resources and Citations

  • 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 8711