murphyDiphenylsiloxy Phenyl/Propyl Trimethicone
molecular structure · PubChem
AKA: Phenyl Silicone
Synthetic
Emollient
Skin Conditioner
Hair Care
Not Clean
OriginSynthesized from silicone polymers and phenyl groups combined with propyl and trimethicone building blocks. Produced through hydrosilylation reactions that bond organic phenyl/propyl groups to siloxane polymer backbone.
Diphenylsiloxy Phenyl/Propyl Trimethicone is a cosmetic ingredient used as hair conditioning, skin conditioning - emollient. Assessed as safe by the CIR.
CAS #
-
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
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.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
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
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-on5.3%
Rinse-offNot reported
0%50%100%
CIR reported use · report published 2023
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR