Steareth-25
AKA “Stearyl Polyethylene Glycol Ether”
Surfactant
Ingredient Facts
Steareth-25
AKA: Stearyl Polyethylene Glycol Ether
Surfactant · Cleansing · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Plant Oil
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-octadecyl-.omega.-hydroxy
Effective at 11.51%
CAS #
9005-00-9
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.
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.
Removes Impurities
Cleansing Surfactant
Emulsifier
Mixes Oil & Water
Traditional Use
A polyethylene glycolated stearyl alcohol created as an emulsifying and solubilizing agent in modern cosmetic formulations.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
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
Ammonium Acryloyldimethyltaurate/Steareth-25 Methacrylate Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isosteareth-25
European Commission
EU Cosmetic Ingredient Database (CosIng)
Steareth-25
European Commission
EU Cosmetic Ingredient Database (CosIng)
Ammonium Acryloyldimethyltaurate/Steareth-25 Methacrylate Crosspolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Jun 2026
Data: CosIng · EWG · CIR