murphyC30-45 Alkyl Cetearyl Dimethicone Crosspolymer
molecular structure · PubChem
AKA: Silicone Crosspolymer
Plant-Derived
Emollient
Occlusive
Skin Conditioner
Hair Care
Silicone
Clean
OriginDerived from silicone polymers and long-chain alkyl alcohols, synthesized through cross-linking chemistry. Produced by cross-polymerizing dimethicone with long-chain alkyl cetearyl alcohols via hydrosilylation reactions.
C30-45 Alkyl Cetearyl Dimethicone Crosspolymer is a copolymer of C30-45 alkyl cetearyl dimethicone crosslinked with vinyl cyclohexene oxide
CAS #
443892-05-5
Form
Liquid
Skin Types
●all-skin-types, gentle
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin 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-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
Concentration Guide
Leave-on0.2–4%
Rinse-offNot reported
0%50%100%
CIR reported use · 2012 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR