Trideceth-21

AKA: 2-(Tridecyloxy)ethanol, 38471-49-7, Ethanol, Tridecyl ethyleneglycol monoether, TRIDECETH-1, NOVEL TDA 1, ETHYLENE GLYCOL MONOTRIDECYL ETHER

Synthetic

Cleanser

Not Clean

OriginDerived from tridecyl alcohol and ethylene oxide, both petroleum-based or plant-derived synthetic compounds. Synthesized through ethoxylation, where ethylene oxide chains are added to tridecyl alcohol under catalytic conditions.

Poly(oxy-1,2-ethanediyl), .alpha.-tridecyl-.omega.-hydroxy- (21 mol EO average molar ratio)

Formula

C15H32O2

Mol. Weight

244.41

CAS #

24938-91-8

Form

Liquid

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

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.

Removes Impurities

Cleansing Surfactant

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

Yes

Concentration Guide

CIR lists it as not reported to be in use.

CIR · report published 2012

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: PubChem · CosIng · EWG · CIR