murphyPEG/PPG-8/3 Diisostearate
molecular structure · PubChem
AKA: Diisostearate copolymer, Silicone emollient
Plant-Derived
Cleanser
Emulsifier
Clean
OriginDerived from coconut, palm, or soy oils through esterification with isostearic acid and polyethylene glycol. Synthesized by condensing polyethylene glycol and polypropylene glycol with diisostearate through chemical esterification.
PEG/PPG-8/3 Diisostearate is the polyethylene glycol ether of the propoxylated diester of isostearic acid containing an average ethoxylation value of 8 and propoxylation value of 3.
CAS #
-
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.
Cleansing Surfactant
Emulsifier
Removes Impurities
Mixes Oil & 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
2
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Skin Irritant
1 study / 1 not irritating (CIR 841)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 841)
Not an Eye Irritant
1 study / 1 not irritating (CIR 841)
Concentration Guide
Leave-on5%
Rinse-offNot reported
0%50%100%
CIR reported use · report published 2022
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR