Peg 100 Stearate

Peg 100 Stearate 1
photograph
AKA: ● N
Plant-Derived
Emulsifier
Skin Conditioner
Clean
OriginDerived from stearic acid, typically sourced from plant oils like coconut or palm kernel oil. Produced through polyethylene glycol ethoxylation and esterification of stearic acid.
Restricted:EWG VERIFIED products cannot contain this ingredient without adequate substantiation.
Formula
C20H40O3
Mol. Weight
328.5
CAS #
9004-99-3
Form
Liquid
Skin Types
●all-skin-types, gentle
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.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Cleansing Surfactant
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
2
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not a Skin Irritant
1 study / 1 not irritating (CIR 211)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 211)
Not Phototoxic
Product formulation test found no phototoxicity in the CIR safety assessment (CIR 211)
Concentration Guide
Leave-on0.0075–6%
Rinse-off0.00033–2.5%
0%50%100%
CIR reported use · 2023 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR