murphyPPG-2 Butyl Ether
molecular structure · PubChem
AKA: Polypropylene Glycol Butyl Ether
Synthetic
Solvent
Skin Conditioner
Hair Care
Clean
OriginPPG-2 Butyl Ether is synthesized from propylene glycol and butyl alcohol as starting materials. It is produced through etherification, where propylene glycol reacts with butanol under catalytic conditions.
Polyoxypropylene (2) 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.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Locks in moisture
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Eye Irritant in Testing
1 study / 1 irritating / reactions moderate (CIR 300)
Skin Irritant in Testing
1 study / 1 irritating (CIR 300)
Concentration Guide
Leave-on2%
Rinse-off3–8%
0%50%100%
CIR reported use · 2015 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR