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PEG-7 Stearate
AKA “Ethylene glycol monostearate, Glycol stearate, 2-Hydroxyethyl octadecanoate, Monthybase, Monthyle, Parastarin, Ivorit, Sedetol”
Synthetic
Ingredient Facts
Peg-7 stearate
AKA: Ethylene glycol monostearate, Glycol stearate, 2-Hydroxyethyl octadecanoate, Monthybase, Monthyle, Parastarin, Ivorit, Sedetol
Synthetic · Cleansing · EWG: 4
Plant-Derived Synthetic
Cleanser
Emulsifier
Skin Conditioner
Synthetic
Clean
A gentle emulsifier that helps blend water and oil ingredients together, creating smooth, easy-to-apply textures in cleansers and moisturizers.
Solubility POLYETHYLENE GLYCOL ESTERS AND ETHERS INCR THE WATER SOLUBILITY OF TYROTHRICIN.
Formula
C20H40O3
Mol. Weight
328.50
CAS #
9004-99-3
See origin →
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Surfactant Emulsifying
Moisturizing
Locks in moisture to keep skin soft and supple throughout the day
Antimicrobial
Strengthens Barrier
Mixes oil and water
Traditional Use
Developed in the mid-20th century as a polyethylene glycol ester of stearic acid. Created as a synthetic emulsifier and surfactant to replace traditional animal fat-based emulsifiers in cosmetics and personal care products.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR