Stearamidopropyl Betaine
AKA “(Carboxymethyl)dimethyl-3-[(1-oxooctadecyl)amino]propylammonium hydroxide, 1-Propanaminium, N-(carboxymethyl)-N, N-dimethyl-3-[(1-oxooctadecyl)amino]-, inner salt, 56Y0Z3W67K, N-dimethyl-3-((1-oxooctadecyl)amino)-, hydroxide, STEARATE AMIDOPROPYLDIMETHYL ACETATE BETAINE, DIMETHYLCARBOXYMETHYLENEPROPYLENEAMIDOSTEARATE-BETAINE, (Carboxymethyl)dimethyl-3-((1-oxooctadecyl)amino)propylammonium hydroxide, (CARBOXYMETHYL)DIMETHYL(3-STEARAMIDOPROPYL)AMMONIUM HYDROXIDE, INNER SALT”
Surfactant
Ingredient Facts
Stearamidopropyl betaine
AKA: (Carboxymethyl)dimethyl-3-[(1-oxooctadecyl)amino]propylammonium hydroxide, 1-Propanaminium, N-(carboxymethyl)-N, N-dimethyl-3-[(1-oxooctadecyl)amino]-, Inner salt, 56Y0Z3W67K, N-dimethyl-3-((1-oxooctadecyl)amino)-, Hydroxide, STEARATE AMIDOPROPYLDIMETHYL ACETATE BETAINE, DIMETHYLCARBOXYMETHYLENEPROPYLENEAMIDOSTEARATE-BETAINE, (Carboxymethyl)dimethyl-3-((1-oxooctadecyl)amino)propylammonium hydroxide, (CARBOXYMETHYL)DIMETHYL(3-STEARAMIDOPROPYL)AMMONIUM HYDROXIDE, INNER SALT
Surfactant · Cleansing · EWG: 4
Plant-Derived
Cleanser
Skin Conditioner
Hair Care
Plant Oil
Not Clean
(Carboxymethyl)dimethyl-3-[(1-oxooctadecyl)amino]propylammonium hydroxide
Formula
C25H50N2O3
Mol. Weight
426.70
CAS #
6179-44-8
Form
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.
Foaming
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.
Viscosity Controlling
Locks in moisture
Traditional Use
Modern synthetic amphoteric surfactant created by combining stearamide with betaine chemistry. Developed in the late 20th century as a gentler, amphoteric cleansing agent for shampoos and body washes with improved mildness compared to traditional surfactants.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Final Report: Safety Assessment of Ammonia and Ammonium Hydroxide as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Safety Assessment of Alumina and Aluminum Hydroxide as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Safety Assessment of Inorganic Hydroxides as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Ammonium Hydroxide
European Commission
EU Cosmetic Ingredient Database (CosIng)
Calcium Hydroxide
European Commission
EU Cosmetic Ingredient Database (CosIng)
Iron Hydroxide
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isostearamidopropyl Betaine
European Commission
EU Cosmetic Ingredient Database (CosIng)
Magnesium Hydroxide
European Commission
EU Cosmetic Ingredient Database (CosIng)
Potassium Hydroxide
European Commission
EU Cosmetic Ingredient Database (CosIng)
Stearamidopropyl Betaine
European Commission
EU Cosmetic Ingredient Database (CosIng)
Zinc Ascorbate Hydroxide
European Commission
EU Cosmetic Ingredient Database (CosIng)
Zinc Carbonate Hydroxide
European Commission
EU Cosmetic Ingredient Database (CosIng)
Aluminum Hydroxide
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Ammonium Hydroxide
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Calcium Hydroxide
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Iron Hydroxide
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Magnesium Hydroxide
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Potassium Hydroxide
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Sodium Hydroxide
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Zinc Carbonate Hydroxide
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Properties and applications of calcium hydroxide in endodontics and dental traumatology.
Mohammadi Z, Dummer PM
International endodontic journal, 2011
Impact of Dietary Zinc Chloride Hydroxide and Zinc Methionine on the Faecal Microbiota of Healthy Adult Horses and Ponies.
Paßlack N, van Bömmel-Wegmann S, Vahjen W, Zentek J
Journal of equine veterinary science, 2022
Development of magnesium hydroxide-doped nanofibrous spheres for repairing infected skin wounds.
You Y, Ning X, Zhang X, Wang Y, Zhang Y et al.
Biomaterials advances, 2024
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR