PEG-8 Diisostearate
AKA “Polyethylene Glycol 8 Diisostearate, PEG-8 Diisostearic Acid Ester
Surfactant
Ingredient Facts
Peg-8 diisostearate
AKA: Polyethylene Glycol 8 Diisostearate, PEG-8 Diisostearic Acid Ester
Surfactant · Emulsifying · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-hydroxy-, diesters with isooctadecanoic acid (8 mol EO average molar ratio)
Form
Liquid
See origin →
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
Modern emulsifier created from branched stearic acid derivatives and PEG technology in the 20th century. Developed to improve the stability and texture of oil-based and mixed-phase cosmetic products.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR