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Coumarin
AKA “2H-1-Benzopyran-2-one”
Ingredient
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Ingredient Facts
Coumarin
AKA: 2H-1-Benzopyran-2-one
Ingredient · Perfuming · EWG: 4
Synthetic
Fragrance
Safety Concern
Not Clean
Coumarin; 2H-1-Benzopyran-2-one
Formula
C9H6O2
Mol. Weight
146.14
CAS #
91-64-5
Form
Powder
See origin →
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
Allergen Warning
⚠️ EU Fragrance Allergen
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Caution
CIR Safety Findings
ewg-4
all-shades-safe
Regulatory Status
USA✔ permitted
EU✔ permitted
JAPAN✔ permitted
CANADA✔ permitted
All In: The Farm Collection
Acure
 →
Bathroom Sink Ritual Set
Acure
 →
Body Lotion
Acure
 →
Body Wash Oil
Acure
 →
Farmhouse Sink Duo
Acure
 →
Moisture Rich Body Set
Acure
 →
Skin Perfecting Skincare Set
Acure
 →
Rejuvenating Night Oil / Extra Healing
Marie Veronique
 →
Bio-Shield Face Oil - 4ML – Tata Harper Skincare
Tata Harper Skincare
 →
Crème Riche & Retinoic Nutrient Face Oil
Tata Harper Skincare
 →
Rejuvenating Serum - 10ML
Tata Harper Skincare
 →
Resurfacing Body Serum - 25ml
Credo Beauty
 →
Resurfacing Body Serum - 25ml – Tata Harper Skincare
Tata Harper Skincare
 →
Resurfacing Mask - 5ML
Credo Beauty
 →
Resurfacing Serum - 10ML
Credo Beauty
 →
Resurfacing Serum - 10ML – Tata Harper Skincare
Tata Harper Skincare
 →
Retinoic Nutrient Face Oil - 4ML
Credo Beauty
 →
Retinoic Nutrient Face Oil - 4ML – Tata Harper Skincare
Tata Harper Skincare
 →
The Body Essentials
Nécessaire
 →
The Skin Smoother Set
Acure
 →
Coumarin
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Coumarin
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
3-(α-Naphthyl)-4-hydroxycoumarin
Health Canada
Health Canada Cosmetic Ingredient Hotlist
→
4,4'-Dihydroxy-3,3'-(3-methylthiopropylidene) dicoumarin
Health Canada
Health Canada Cosmetic Ingredient Hotlist
→
4,6-Dimethyl-8-tert-butylcoumarin
Health Canada
Health Canada Cosmetic Ingredient Hotlist
→
7-Methoxycoumarin
Health Canada
Health Canada Cosmetic Ingredient Hotlist
→
Dihydrocoumarin
Health Canada
Health Canada Cosmetic Ingredient Hotlist
→
Furocoumarins, except for naturally occurring in plant extracts
Health Canada
Health Canada Cosmetic Ingredient Hotlist
→
Antagonists of Vitamin K-Popular Coumarin Drugs and New S...
Kinga Kasperkiewicz, Michał B Ponczek, Jacek Owczarek, Piotr Guga, Elżbieta Budzisz
Molecules (Basel, Switzerland), 2020
→
Antagonists of Vitamin K-Popular Coumarin Drugs and New S...
Kinga Kasperkiewicz, Michał B Ponczek, Jacek Owczarek, Piotr Guga, Elżbieta Budzisz
Molecules (Basel, Switzerland), 2020
→
Antagonists of Vitamin K-Popular Coumarin Drugs and New S...
Kinga Kasperkiewicz, Michał B Ponczek, Jacek Owczarek, Piotr Guga, Elżbieta Budzisz
Molecules (Basel, Switzerland), 2020
→
Development of a comprehensive analytical method for furanocoumarins in grapefruit and their metabolites in plasma and urine using UPLC-MS/MS: a preli
Lee SG, Kim K, Vance TM, Perkins C, Provatas A et al.
International journal of food sciences and nutrition, 2016
→
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR