Oleyl Ethyl Phosphate
molecular structure · PubChem
AKA: Ethyl oleyl phosphate, Ethyl oleyl hydrogen orthophosphate, 10483-96-2, Oleyl ethyl phosphate [INCI], Phosphoric acid, Monoethyl mono-(9Z)-9-octadecenyl ester
Synthetic
Cleanser
Emulsifier
Not Clean
Phosphoric acid, monoethyl mono-9-octadecenyl ester (Z)-
Formula
C20H39O5P
Mol. Weight
390.50
CAS #
10483-96-2
Form
Powder
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Surfactant Cleansing
Surfactant Emulsifying
Moisturizing
Antimicrobial
Fights Acne
Lifts away dirt and oil
Mixes oil and water
Traditional Use
Developed as a synthetic phosphate ester in the 20th century. Used in cosmetics as an emulsifier and conditioning agent with no traditional use history.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️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