PEG-2 Sorbitan Isostearate
AKA “Polyethylene glycol 2 sorbitan isostearate, Polysorbate derivative
Surfactant
Ingredient Facts
Peg-2 sorbitan isostearate
AKA: Polyethylene glycol 2 sorbitan isostearate, Polysorbate derivative
Surfactant · Cleansing · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Not Clean
1,4-Anhydro-D-glucitol, monoisooctadecanoate, poly(oxy-1,2-ethanediyl) derivatives (2 mol EO average molar ratio)
CAS #
66794-58-9
Form
Liquid
See origin →
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing Surfactant
Emulsifier
Reduces Inflammation
Wound Healing
Fights Bacteria
Removes Impurities
Mixes Oil & Water
Traditional Use
Synthetic surfactant developed in the mid-20th century as a polyethylene glycol derivative of sorbitan esters. Engineered to improve emulsification in cosmetic formulations.
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