Undecyleneth-6

AKA: Undecylenic Alcohol Ethoxylate

Synthetic

Preservative

Cleanser

Emulsifier

Not Clean

Poly(oxy-1,2-ethanediyl), .alpha.-(10-undecenyl)-.omega.-hydroxy- (6 mol EO average molar ratio)

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

Skin Types

●all-skin-types

Best For

General

Functions

Anti-Seborrheic

Antimicrobial

Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.

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.

Controls excess oil

Fights acne

Causing bacteria

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed1 review →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

EWG

CIR

Safe as used

Pregnancy

—

Concentration Guide

CIR lists it as not reported to be in use.

CIR · report published 2012

Regulatory Status

USA✔ permitted

CANADA✔ permitted

Regulatory Agencies

Verified Jun 2026

Data: CosIng · EWG · CIR