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Isosteareth-5
AKA “Isosteareth-2, MR84JXT097, RefChem:1087831, 2-[2-(16-methylheptadecoxy)ethoxy]ethanol, 52292-17-8, Agnique MMF, HETOXOL IS-2, PEG-12 Isostearyl ether, PEG-50 Isostearyl ether, SCHEMBL9705636”
Surfactant
Ingredient Facts
Isosteareth-5
AKA: Isosteareth-2, MR84JXT097, RefChem:1087831, 2-[2-(16-methylheptadecoxy)ethoxy]ethanol, 52292-17-8, Agnique MMF, HETOXOL IS-2, PEG-12 Isostearyl ether, PEG-50 Isostearyl ether, SCHEMBL9705636
Surfactant · Cleansing · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Not Clean
Polyoxyethylene (5) Isostearyl Ether
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
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 Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR