murphyDimethicone
molecular structure · PubChem
AKA: 30% ACTIVE, 10% ACTIVE, 20% ACTIVE, TRIMETHYLSILOXY TERMINATED, REDUCED VOLATILITY, VISCOSITY 20 CST
Synthetic
Emollient
Skin Conditioner
Silicone
Not Clean
OriginDerived from silica and methyl chloride, both petroleum-based chemical feedstocks in the silicone family. Synthesized through hydrolysis and condensation polymerization of dimethyldichlorosilane monomers to form long-chain siloxane polymers.
Restricted:EWG VERIFIED products cannot contain this ingredient without adequate substantiation.
CAS #
63148-62-9, 9006-65-9, 9016-00-6
Form
Liquid
State
Liquid
Skin Types
●all-skin-types
Best For
General
Functions
Lubricant
Conditioning Agent
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Nourishes & Protects
Locks In Moisture
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
5
CIR
Safe as used
Pregnancy
—
Restricted By
CIR Safety Findings
Not a Sensitizer
8 studies / 8 not sensitizing (CIR 307 and 807)
Mixed Eye Irritation Results
16 studies / 12 irritating / 1 mixed / 3 not irritating / reactions minimal to severe (CIR 307 and 807)
Mixed Skin Irritation Results
19 studies / 8 irritating / 1 mixed / 10 not irritating / reactions minimal to severe (CIR 307 and 807)
Concentration Guide
Leave-on0.002–85%
Rinse-off0.0000014–23.4%
0%50%100%
Reg. limit 30%
CIR reported use · 2019 survey
FDA OTC limit (Skin Protectant): 30%. 21 CFR 347.10
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR