murphyButyl Oleate
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
OriginDerived from oleic acid and butanol, both obtained through petroleum refining or vegetable oil processing. Synthesized through esterification, where oleic acid and butanol are chemically combined using acid catalysts.
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
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
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
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.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
1 study / 1 not sensitizing (CIR 623)
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2015
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR