Pungent, sour fatty acid with a strong rancid-cheese and sweaty character. In extreme dilution it lends a waxy, animalic warmth useful in trace amounts for cheese, dairy, and skin-like effects.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 622.
Colorless oily liquid
Soluble in cold water, soluble in alcohol, miscible with oils
The commercial product has a very unpleasant, sour-sweat-like, fatty odor. A highly purified acid is considerably more attractive, although it still has a fatty odor, it is more fat-like without having the typical 'rancid' odor or sweat-like notes.
Traces of this acid are occasionally used in perfume compositions, e.g. in Labdanum compositions and in artificial Civet.
Produced by oxidation of Heptaldehyde