Butyl Oleate
molecular structure · PubChem
AKA: 142-77-8, N-Butyl oleate, Butyl cis-9-octadecenoate, Advaplast 42, Kesscoflex BO, 1-Butyl oleate, OLEIC ACID, BUTYL ESTER, Butyloleate, Wilmar Butyl Oleate
Synthetic
Emollient
Skin Conditioner
Not Clean
N-butyl oleate is a fatty acid ester obtained by the formal condensation of the hydroxy group of butan-1-ol with the carboxy group of oleic acid. It has a role as a human metabolite. It is functionally related to an oleic acid and a butan-1-ol.
Solubility SOL IN ALCOHOL; INSOL IN WATER
Formula
C22H42O2
Mol. Weight
338.60
CAS #
142-77-8
Form
Liquid
State
Liquid; Water or Solvent Wet Solid
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.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
Traditional Use
Synthetic ester derived from oleic acid chemistry, developed as a lightweight emollient for cosmetics. Designed to improve skin feel and absorption in modern skincare products.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR