Laneth-9 Acetate
molecular structure · PubChem
AKA: 2-Hydroxyethyl acetate, 542-59-6, Ethylene glycol monoacetate, 2-Acetoxyethanol, Glycol monoacetate, Beta-Hydroxyethyl acetate, ETHYLENEDIOL MONOACETATE, MONOACETYL ETHYLENE GLYCOL
Synthetic
Emollient
Skin Conditioner
Hair Care
Barrier Lipid
Not Clean
See also: Lanolin, ethoxylated, acetate (annotation moved to).
Solubility greater than or equal to 100 mg/mL at 70 °F (NTP, 1992)
Formula
C4H8O3
Mol. Weight
104.10
CAS #
65071-98-9
Form
Liquid
State
Almost odorless clear colorless liquid. (NTP, 1992)
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.
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
A synthetic derivative combining lanolin ethoxylation with acetylation, developed in the mid-20th century. Created to provide specific emulsification and texture properties in cosmetic formulations.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR