murphyPPG-30 Steareth-4
molecular structure · PubChem
AKA: Polypropylene Glycol-30 Steareth-4, PPG Emulsifier
Plant-Derived
Emollient
Cleanser
Emulsifier
Skin Conditioner
Not Clean
OriginDerived from stearic acid and stearyl alcohol, typically sourced from vegetable oils like palm or coconut. Synthesized through ethoxylation and polyethylene glycol (PPG) condensation with stearyl alcohol.
Oxirane, methyl-, polymer with oxirane, stearyl ether (4 mol EO; 30 mol PO average molar ratios)
CAS #
9038-43-1
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Locks In Moisture
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
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2016
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR