Undecylenoyl Phenylalanine

AKA “175357-18-3, Sepiwhite msh, undecylenoylphenylalanine, Sepiwhite msh QD, N-Undecenoyl-L-phenylalanine, L-Phenylalanine, N-(1-oxo-10-undecenyl)-, Sepiwhite, 271P08C6OD, N-(1-oxo-10-undecen-1-yl)-”

Skin Conditioning

Ingredient Facts

Undecylenoyl phenylalanine

AKA: 175357-18-3, Sepiwhite msh, Undecylenoylphenylalanine, Sepiwhite msh QD, N-Undecenoyl-L-phenylalanine, L-Phenylalanine, N-(1-oxo-10-undecenyl)-, Sepiwhite, 271P08C6OD, N-(1-oxo-10-undecen-1-yl)-

Skin Conditioning · Skin Conditioning · EWG: 1

Synthetic

Skin Conditioner

Amino Acid

Clean

L-Phenylalanine, N-(1-Oxo-10-Undecenyl)-

Effective at 1.25%

Formula

C20H29NO3

Mol. Weight

331.40

CAS #

175357-18-3

Form

Powder

See origin →

Functions

Skin Conditioning

A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.

Locks in moisture

Traditional Use

A synthetic cosmetic ingredient made by conjugating undecylenic acid with the amino acid phenylalanine. Developed to combine antimicrobial properties with amino acid skin benefits.