murphyPEG-2 Sorbitan Isostearate
molecular structure · PubChem
AKA: Polyethylene glycol 2 sorbitan isostearate, Polysorbate derivative
Plant-Derived
Cleanser
Emulsifier
Not Clean
OriginTypically derived from sorbitol and isostearic acid, both plant-derived fatty acid components.
Produced through esterification of sorbitan with isostearic acid, followed by ethoxylation with polyethylene glycol.
1,4-Anhydro-D-glucitol, monoisooctadecanoate, poly(oxy-1,2-ethanediyl) derivatives (2 mol EO average molar ratio)
CAS #
66794-58-9
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2015
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR