Isomyreth-9
AKA “Isomyreth-9, Polyethylene Glycol Isomyreth
Synthetic
Ingredient Facts
Isomyreth-9
AKA: Polyethylene Glycol Isomyreth
Synthetic · Cleansing · EWG: 3
Synthetic
Cleanser
Emulsifier
Synthetic
Clean
Polyoxyethylene (9) Isomyristyl Ether Science: Functions: Surfactant - Cleansing, Surfactant - Emulsifying Safety Ratings: CIR: Safe as used
CAS #
9002-92-0; 68439-50-9; 5274-68-0; 9004-95-9; 9005-00-9; 4536-30-5; 3055-93-4; 3055-94-5; 3055-95-6
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
Removes Impurities
Mixes Oil & Water
Traditional Use
A synthetic ethoxylated ester developed in the 20th century for use as an emulsifier and surfactant in cosmetics. Created to improve the stability and texture of creams and lotions.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
3
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR
Isomyreth-9 — Duck Heart Ghost