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Butyric acid

Butanoic acid

Butyric acid

Short-chain fatty acid · C₄H₈O₂

Chemical structure of Butyric acid
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
107-92-6
Molecular formula
C₄H₈O₂
Molecular weight
88.11 g/mol
Origin
Nature-identical
Odor family
Animalic
Note
Top
Aroma
Rancid butter, cheese, vomit; very unpleasant when concentrated.

History

Butyric acid occurs in butter (as glyceride esters), cheese and sweat. The name comes from the Latin butyrum, meaning butter.

In perfumery

In fragrance, butyric acid is used only in minute traces for animal or milky effects; its esters are far more common for fruity notes.

Regulatory status

Unrestricted · No IFRA standard
IFRA 51
No dedicated IFRA Standard in the 51st Amendment index.
EU allergen 2023/1545
Not named individually in the expanded allergen list of Regulation 2023/1545.

Sources

  1. Wikidata Q193213 (CAS 107-92-6, formula; data mirrored from PubChem)
  2. Sell C.S. (ed.) The Chemistry of Fragrances: From Perfumer to Consumer, 2nd ed., Royal Society of Chemistry 2006
  3. The Good Scents Company Information System, material entries
  4. IFRA Standards, 51st Amendment: Index of IFRA Standards (notified 30 June 2023)