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Isovaleric acid

3-Methylbutanoic acid

Isovaleric acid, 3-Methylbutyric acid

Branched fatty acid · C₅H₁₀O₂

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

Chemical info

CAS number CAS
503-74-2
Molecular formula
C₅H₁₀O₂
Molecular weight
102.13 g/mol
Origin
Nature-identical
Odor family
Animalic
Note
Top
Aroma
Cheesy, sweaty feet; slightly fruity when very dilute.

History

Isovaleric acid occurs in valerian root (Valeriana officinalis) and in cheese, and is a component of human sweat odor. The name comes from the valerian plant.

In perfumery

In fragrance it is used only in traces for a skin or animal effect; in flavors it is used for cheese and fruit notes.

Connections

Evokesvalerian
Found in natureValerian (Valeriana officinalis)

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. NCI/CADD Chemical Identifier Resolver, CAS 503-74-2 (formula, names)
  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)