Undecylenamide MEA
AKA “10-Undecenamide, N-(2-hydroxyethyl)-, N-(2-Hydroxyethyl)undec-10-enamide, n-(2-hydroxyethyl)-10-undecenamide, Undecylenoyl monoethanolamide, Undecylenic acid monoethanolamide, MAYFUNG, METANID, FUNGICID UMA, STEINAZID U 185
Surfactant
Ingredient Facts
Undecylenamide mea
AKA: 10-Undecenamide, N-(2-hydroxyethyl)-, N-(2-Hydroxyethyl)undec-10-enamide, N-(2-hydroxyethyl)-10-undecenamide, Undecylenoyl monoethanolamide, Undecylenic acid monoethanolamide, MAYFUNG, METANID, FUNGICID UMA, STEINAZID U 185
Surfactant · Antimicrobial · EWG: 4
Synthetic
Preservative
Cleanser
Skin Conditioner
Hair Care
Plant Oil
Not Clean
N-(2-Hydroxyethyl)undec-10-enamide
Formula
C13H25NO2
Mol. Weight
227.34
CAS #
20545-92-0
Form
Liquid
See origin →
Functions
Antimicrobial
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Antistatic
Hair 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
Fights Bacteria
Traditional Use
Developed in the 20th century as a synthetic surfactant derived from undecylenic acid. Used in cosmetics as a cleansing and conditioning agent, particularly in shampoos and body washes.
Skin Types
all-skin-types
Best For
General
EWG
4
CIR
Safe as used
Pregnancy
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR