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Citronellic acid

3,7-Dimethyl-6-octenoic acid

Rhodinolic acid

Aliphatic monoterpenoid alkene carboxylic acid · C₁₀H₁₈O₂

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

Chemical info

CAS number CAS
18951-85-4
Molecular formula
C₁₀H₁₈O₂
Molecular weight
170.25 g/mol
Aroma
Warm woody, slightly honeyed, with a soft balsamic edge.

Safety

Low concern · Mild skin irritant

Citronellic acid is a natural metabolite of citronellol. The compound appears primarily in emerald cypress.

Skin. Undiluted application to rabbit skin was moderately irritating. A 2 percent patch test on 25 volunteers caused no irritation or sensitization.

Oral and dermal. Acute oral LD50 in rats is 2.61 g/kg; rabbit dermal LD50 is 450 mg/kg, a moderate level.

Limited data suggest the compound has slight toxicity and minimal skin reactivity risk.

Usage guidelines

Concern level
Low
Oils with high content
Emerald cypress 24.3 percent · Chaste tree leaf 0–6.6 percent

Found in essential oils

Principal sources
Cypress (emerald)24.3 %
Chaste tree0 – 6.6 %
Cypress (jade)1.6 %

Notes

Citronellic acid is a natural oxidation product of citronellol. The compound contributes little aroma value but is part of the metabolic profile of cypress oils.