Isosteareth-5
AKA “Isosteareth-2, RefChem:1087831, Agnique MMF, HETOXOL IS-2, PEG-12 Isostearyl ether, PEG-50 Isostearyl ether”
Synthetic
Ingredient Facts
Isosteareth-5
AKA: Isosteareth-2, RefChem:1087831, Agnique MMF, HETOXOL IS-2, PEG-12 Isostearyl ether, PEG-50 Isostearyl ether
Synthetic · Cleansing · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Synthetic
Clean
A gentle cleanser and natural emulsifier derived from plant sources that helps remove impurities while blending water and oil-based ingredients for a smooth product texture.
Effective at 11.51%
Formula
C22H46O3
Mol. Weight
358.60
CAS #
52292-17-8
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
Developed as a synthetic surfactant with mild cleansing properties. Used in contemporary cosmetics as an emulsifier and mild detergent.
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
Concentration Guide
0.02%
23.0%
0%32%
Effective Range
CIR reported use: 18-23 | 0.02-0.4 | 0.2-1
Regulatory Agencies
Isosteareth-2
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isosteareth-20
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isosteareth-22
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isosteareth-25
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isosteareth-5
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isosteareth-50
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isosteareth-20
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR