Cetyl Betaine
AKA “Palmityldimethylbetaine, N-(carboxymethyl)-N, inner salt, (Carboxylatomethyl)hexadecyldimethylammonium, EINECS 211-748-4, BRN 3676787, AMPHOSOL CDB, MACKAM CET
Synthetic
Ingredient Facts
Cetyl betaine
AKA: Palmityldimethylbetaine, N-(carboxymethyl)-N, Inner salt, (Carboxylatomethyl)hexadecyldimethylammonium, EINECS 211-748-4, BRN 3676787, AMPHOSOL CDB, MACKAM CET
Synthetic · Cleansing · EWG: 1
Synthetic
Cleanser
Skin Conditioner
Hair Care
Amino Acid
Plant Oil
Synthetic
Clean
A gentle cleanser and conditioner that helps remove dirt while softening hair and skin. It also reduces frizz and creates a luxurious lather in shampoos and body washes.
Effective at 4.35%
Formula
C20H41NO2
Mol. Weight
327.50
CAS #
693-33-4
Form
Liquid
State
Liquid
See origin →
Functions
Antistatic
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Foam Boosting
Viscosity Controlling
Locks in moisture
Traditional Use
A synthetic amphoteric surfactant created in the mid-20th century as part of the development of gentler cleansing agents. Designed to replace harsher soap-based ingredients in shampoos and body washes.
Skin Types
all-skin-types, gentle
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Concentration Guide
0.0001%
8.7%
0%12%
Effective Range
CIR reported use: 0.0001-8.7 | 0.36-7.4
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR