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Ingredient Facts
Peg-20 sorbitan isostearate
AKA: Polysorbate 56, Sorbitan Isostearate PEG-20
Surfactant · Cleansing · EWG: 3
Plant-Derived
Cleanser
Emulsifier
Not Clean
Sorbitan, monoisooctadecanoate, poly(oxy-1,2-ethanediyl) derivatives (20 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.
Surfactant Cleansing
Surfactant Emulsifying
Moisturizing
Strengthens Barrier
Lifts away dirt and oil
Mixes oil and water
Traditional Use
A modern synthetic emulsifier created by combining sorbitan (a sugar derivative) with isostearic acid and polyethylene glycol. Developed in the late 20th century to provide stable emulsification in cosmetic formulations with a plant-derived base.