murphyTristearyl Phosphate
AKA: Trioctadecyl phosphate, 4889-45-6, Phosphoric acid, Tristearyl ester, Trioctadecyl ester
Plant-Derived
Cleanser
Not Clean
OriginDerived from stearic acid, a long-chain fatty acid typically sourced from animal or plant fats. Synthesized through esterification of stearic acid with phosphoric acid and subsequent neutralization.
The CIR Expert Panel concluded the following 28 alkyl phosphates are safe in the present practices of use and concentration in cosmetics when formulated to be non-irritating...Tristearyl Phosphate...
Formula
C54H111O4P
Mol. Weight
855.40
CAS #
4889-45-6
Form
Powder
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Plasticiser
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Surfactant Cleansing
Lifts away dirt and oil
Adds flexibility
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