Coumarin
AKA: 2H-1-Benzopyran-2-one
Allergen Warning
⚠️ EU Fragrance Allergen
Synthetic
Fragrance
Safety Concern
Not Clean
Coumarin; 2H-1-Benzopyran-2-one
Formula
C9H6O2
Mol. Weight
146.14
CAS #
91-64-5
Form
Powder
Functions
Perfuming
Added for scent. Can be natural or synthetic. Common irritant and allergen — one of the top reasons people react to products.
Traditional Use
Found naturally in tonka beans, vanilla, and other plants, coumarin has been used in traditional perfumery and folk medicine for centuries. First isolated in the 19th century and later synthetically produced; historically valued for its sweet vanilla-like aroma in perfumed cosmetics.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
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Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR