murphyOleyl Phosphate
AKA: Phoslex A 18D, Nostaphat KO 300N, Oleyl alcohol phosphate, 9-Octadecen-1-ol, 37310-83-1
Synthetic
Cleanser
Emulsifier
Clean
OriginDerived from oleyl alcohol and phosphoric acid or phosphate compounds as starting materials. Synthesized through phosphorylation of oleyl alcohol via esterification with phosphoric acid or its derivatives.
Phosphoric acid, 9-(Z)-octadecenyl esters (mono- and di-)
Formula
C18H39O5P
Mol. Weight
366.50
CAS #
37310-83-1
Form
Powder
State
Other Solid; Liquid; Water or Solvent Wet Solid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
1 study / 1 not sensitizing (CIR 671)
Mixed Skin Irritation Results
2 studies / 1 irritating / 1 not irritating (CIR 671)
Eye Irritant in Testing
1 study / 1 irritating / reactions severe (CIR 671)
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2019
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR