murphyLauryl PEG/PPG-18/18 Methicone
molecular structure · PubChem
AKA: Silicone Surfactant, PEG/PPG Methicone
Synthetic
Skin Conditioner
Clean
OriginDerived from Lauryl Methicone, a silicone-based compound, combined with polyethylene and polypropylene glycol units. Synthesized through alkoxylation, adding ethylene oxide and propylene oxide chains to the Lauryl Methicone backbone.
Lauryl PEG/PPG-18/18 Methicone is an alkoxylated derivative of Lauryl Methicone containing an average of 18 moles of ethylene oxide and 18 moles of propylene oxide
Form
Liquid
Skin Types
●all-skin-types
Best For
General
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.
Locks in moisture
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.
EWG
2
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Skin Irritant
1 study / 1 not irritating (CIR 664)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 664)
Concentration Guide
Leave-on0.5–5%
Rinse-off0.33–2%
0%50%100%
CIR reported use · report published 2014
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR