murphyPPG-9 Butyl Ether
molecular structure · PubChem
AKA: Polypropylene Glycol 9 Butyl Ether
Synthetic
Skin Conditioner
Hair Care
Not Clean
OriginPPG-9 Butyl Ether is synthesized from propylene glycol, a petroleum-derived polyol compound. It is produced through the polymerization of propylene oxide followed by etherification with butanol.
Polyoxypropylene (9) butyl ether
CAS #
9003-13-8
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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
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
Eye Irritant in Testing
1 study / 1 irritating (CIR 300)
Skin Irritant in Testing
2 studies / 2 irritating (CIR 300 and 726)
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2022
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR