d-Limonene
AKA: Citrus Terpene
Allergen Warning
⚠️ EU Fragrance Allergen
Synthetic
Fragrance
Not Clean
d-Limonene is a cosmetic ingredient used as masking, perfuming. Rated moderate hazard by EWG.
Formula
C10H16
Mol. Weight
136.23
CAS #
5989-27-5
Form
Oil
Functions
Masking
Perfuming
Added for scent. Can be natural or synthetic. Common irritant and allergen — one of the top reasons people react to products.
Traditional Use
Extracted from citrus peels, this terpene has been used historically in traditional medicine and perfumery for its refreshing scent and potential antimicrobial properties. Widely used in natural cleaning and skincare products as a fragrance and solvent.
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR