murphyPhenyl Dimethicone
molecular structure · PubChem
AKA: Phenyl simethicone, POLY(PHENYLMETHYLSILOXANE), 9005-12-3, Polyphenylmethylsiloxane, MW 2500-2700, 4543-12-8, METHYL(PHENYL)SILANONE, Methylphenylsilanone, C7H8OSi
Synthetic
Skin Conditioner
Silicone
Clean
OriginBelongs to the silicone polymer family, derived from silicon, oxygen, and phenyl organic compounds. Synthesized through hydrolysis and condensation of phenyltrimethoxysilane or similar silane precursors.
1,1,3,3-Tetramethyl-1,3-diphenyldisiloxane; Poly(methyl phenyl siloxane)
Formula
C7H8OSi
Mol. Weight
136.22
CAS #
9005-12-3
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Antifoaming
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
Restricted By
CIR Safety Findings
Not a Skin Irritant (CIR report on the ingredient group)
CIR report statement covering this group of ingredients / not tested individually (CIR 847)
Not a Sensitizer (CIR report on the ingredient group)
CIR report statement covering this group of ingredients / not tested individually (CIR 847)
Concentration Guide
Leave-on0.0096–19.5%
Rinse-offNot reported
0%50%100%
CIR reported use · report published 2023
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR