Sorbic acid

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An organic acid naturally found in the berries of the mountain ash Sorbus aucuparis. Sorbic acid is used as a Preservative primarily in food products, such as cheeses, to inhibit Mold, Yeast, and other Fungi.

Synonyms and Related Terms

2,4-hexadienoic acid; 2-propenyl-acrylic acid

Chemical structure

Sorbic acid.jpg


  • Contact causes irritation.
  • ThermoFisher: SDS

Physical and Chemical Properties

Slightly soluble in water.

Composition C6H8O2
CAS 110-44-1
Melting Point 134.5 C
Molecular Weight mol. wt. = 112.12
Boiling Point 228 C (dec)

Resources and Citations

  • The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 8567