murphyPEG-150 Pentaerythrityl Tetrastearate
molecular structure · PubChem
AKA: Emulsifier
Plant-Derived
Cleanser
Emulsifier
Clean
OriginDerived from stearic acid (a long-chain fatty acid) and pentaerythritol, a synthetic polyol compound. Synthesized through esterification of stearic acid with pentaerythritol, followed by ethoxylation with polyethylene glycol.
2,2-Bis(hydroxymethyl)-1,3-propanediol, ethoxylated, tetraoctadecanoates (150 mol EO average molar ratio)
CAS #
130249-48-8
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Antioxidant Protection
Reduces Inflammation
Mixes Oil & Water
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 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 an Eye Irritant
1 study / 1 not irritating (CIR 663)
Not a Skin Irritant
5 studies / 5 not irritating (CIR 663)
Not a Sensitizer
2 studies / 2 not sensitizing (CIR 663)
Concentration Guide
Leave-on0.037–1.8%
Rinse-off0.0005–5%
0%50%100%
CIR reported use · 2014 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR