murphyPPG-15 Stearyl Ether
molecular structure · PubChem
AKA: Stearyl PPG-15
Plant-Derived
Emollient
Skin Conditioner
Clean
OriginDerived from stearyl alcohol and propylene glycol, both petroleum-derived or plant-based synthetic compounds. Synthesized through ethoxylation, where propylene glycol chains are chemically bonded to stearyl alcohol.
Poly[oxy(methyl-1,2-ethanediyl)], .alpha.-octadecyl-.omega.-hydroxy-
CAS #
25231-21-4
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
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.
Locks In Moisture
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Reviewed by CIR
Pregnancy
Yes
CIR Safety Findings
Not an Eye Irritant
1 study / 1 not irritating (CIR 301)
Skin Irritant in Testing
1 study / 1 irritating / reactions slight (CIR 301)
Concentration Guide
Leave-on3–18%
Rinse-off1–8%
0%50%100%
CIR reported use · 2022 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR