PEG-8 Diisostearate

AKA: Polyethylene Glycol 8 Diisostearate, PEG-8 Diisostearic Acid Ester

Plant-Derived

Cleanser

Emulsifier

Not Clean

OriginDerived from isostearic acid (a branched saturated fatty acid) and ethylene glycol as starting materials. Synthesized through esterification of isostearic acid followed by ethoxylation with eight moles of ethylene oxide.

Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-hydroxy-, diesters with isooctadecanoic acid (8 mol EO average molar ratio)

Form

Liquid

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

Mixes Oil & Water

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.

EWG

CIR

Safe as used

Pregnancy

Yes

Restricted By

Credo Beauty Whole Foods Premium Body Care Beauty Heroes MADE SAFE EWG VERIFIED

Concentration Guide

Leave-on0.5–2%

Rinse-off1.5–4.5%

0%50%100%

CIR reported use · 2014 survey

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR