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PEG-6 Diisostearate
AKA “Polyethylene Glycol 6 Diisostearate”
Synthetic
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Ingredient Facts
Peg-6 diisostearate
AKA: Polyethylene Glycol 6 Diisostearate
Synthetic · Surfactant - Emulsifying | Skin Conditioning | Emollient · EWG: 4
Synthetic
Emollient
Cleanser
Emulsifier
Skin Conditioner
Synthetic
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-(1-oxoisooctadecyl)-.omega.-[(1-oxoisooctadecyl)oxy]- (6 mol EO average molar ratio) Science: Origin: Botanic/Natural | Process: Ethoxylation | Functions: Surfactant - Emulsifying Safety Ratings: CIR: Safe as used
Form
Liquid
Synthetic
Botanical. Derived from diisostearic acid (a branched saturated fatty acid) and ethylene glycol. Synthesized through ethoxylation, attaching polyethylene glycol chains to the fatty acid ester backbone.
Function
Surfactant - Emulsifying | Skin Conditioning | Emollient
Benefits
Surfactant Emulsifying
Moisturizing
Strengthens Barrier
Mixes oil and water
Traditional Use
A synthetic ester emulsifier developed in the 20th century for cosmetic use. Created to provide stable emulsification and improved texture in modern skincare products without a traditional counterpart.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Concentration Guide
Industry Max
Industry typically uses up to 14.03% in leave-on products (1 products reported). Source: CIR Safety Assessment (CIR Seq 689).
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Feb 2026
Data: CosIng · EWG · CIR