PEG-3 Diisostearate
molecular structure · PubChem
AKA: EMALEX TEG-DI-IS, 68958-56-5
Plant-Derived
Cleanser
Emulsifier
Plant Oil
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-(1-oxoisooctadecyl)-.omega.-[(1-oxoisooctadecyl)oxy]- (3 mol EO average molar ratio)
Formula
C42H82O6
Mol. Weight
683.10
CAS #
68958-56-5
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Mixes Oil & Water
Traditional Use
A synthetic polyethylene glycol ester developed in the mid-20th century as a surfactant and emulsifier. Created to provide water solubility to oily compounds and improve product texture in modern cosmetic formulations.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR