murphyCetyl PEG-8 Dimethicone
molecular structure · PubChem
AKA: FCDZUBQKZKFAET-UHFFFAOYSA-N
Synthetic
Cleanser
Emulsifier
Silicone
Not Clean
OriginSynthesized from dimethicone (silicone polymer) and cetyl alcohol through chemical coupling with polyethylene glycol chains. Produced by attaching polyethylene glycol-8 units to dimethicone backbone via ether linkages.
Siloxanes and silicones, dimethyl, hexadecyl methyl, 3-(hydropoly(oxyethanediyl)oxy)propyl methyl (8 mol EO average), trimethylsilyl terminated
Formula
C26H62O5Si4
Mol. Weight
567.1
CAS #
-
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Surfactant Emulsifying
Anti-Inflammatory
Moisturizing
Boosts Collagen
Mixes oil and water
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
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2014
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR