C13-15 Pareth-21
AKA “C13-15 alcohol ethoxylate, alcohol 21 EO
Synthetic
Ingredient Facts
C13-15 pareth-21
AKA: C13-15 alcohol ethoxylate, Alcohol 21 EO
Synthetic · Cleansing · EWG: 4
Synthetic
Cleanser
Plant Oil
Synthetic
Clean
Alcohols, C13-15, ethoxylated (21 mol EO average molar ratio) Science: Functions: Cleansing, Surfactant - Cleansing Safety Ratings: CIR: Safe as used
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
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.
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
Traditional Use
Synthetic nonionic surfactant developed in the mid-20th century as part of the polyethoxylated alcohol family. Designed as a potent emulsifier and solubilizer for cosmetic formulations.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR