Ceramide 1 A
AKA “Ceramide 1 A [INCI], Linoleoyloxyheptacosanoyl-C18-phytosphingosine, 4-Octadecanetriol, 2-linolenoylheptacosamide, CERAMIDE 1 A (RETIRED), CERAMIDE 1 A (RETIRED) [INCI]”
Synthetic
Ingredient Facts
Ceramide 1 a
AKA: Ceramide 1 A [INCI], Linoleoyloxyheptacosanoyl-C18-phytosphingosine, 4-Octadecanetriol, 2-linolenoylheptacosamide, CERAMIDE 1 A (RETIRED), CERAMIDE 1 A (RETIRED) [INCI]
Synthetic · Hair Conditioning · EWG: 4
Synthetic
Skin Conditioner
Hair Care
Ceramide
Synthetic
Clean
Ceramide 1 A (Retired) is the N-acylated phytosphingosine having the erythro structure that conforms generally to the formula, where n has a value ranging from 10 to 20.The INCI Name, Ceramide 1 A, originally developed in 1997, was designated with a retired status in 2014. For an interim period of time, trade name assignments formerly published with the INCI Name Ceramide 1 A will be retained in the retired monograph, and also published with the new name assignment, Ceramide EOP. Science: Functions: Hair Conditioning, Skin Conditioning Safety Ratings: CIR: Safe as used
Formula
C63H121NO6
Mol. Weight
988.6
CAS #
179186-48-2
Form
Liquid
See origin →
Functions
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.
Strengthens skin barrier
Locks in moisture
Prevents moisture loss
Traditional Use
A specific ceramide variant identified through modern skin lipid research in the late 20th century. Synthetically produced to mimic the skin's natural moisture-retention ceramides for barrier repair.
Skin Types
●all-skin-types
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR