PPG-4 Butyl Ether

PPG-4 Butyl Ether molecular structure
molecular structure · PubChem
AKA: Polypropylene Glycol 4 Butyl Ether, Butoxypropanol
Synthetic
Skin Conditioner
Hair Care
Not Clean
Polyoxypropylene (4) butyl ether
CAS #
9003-13-8
Form
Liquid
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.
Locks in moisture
Traditional Use
Synthetic solvent and humectant developed in the mid-20th century. Used in cosmetics to dissolve ingredients and maintain moisture in formulations.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed0 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR