No Image Available
C30-45 Alkyl Methicone
AKA “Silicone, Alkyl Methicone”
Emollient
Make this about you

Tap what applies — every card instantly flags it for you. Stays on your device, syncs if you're signed in.

Ingredient Facts
C30-45 alkyl methicone
AKA: Silicone
Emollient · Emollient · EWG: 2
Synthetic
Emollient
Skin Conditioner
Silicone
Clean
Siloxanes and silicones, C30-45-alkyl methyl
CAS #
246864-88-0
Form
Liquid
See origin →
Functions
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.
Viscosity Controlling
Locks In Moisture
Traditional Use
Developed in the mid-20th century as a silicone-based polymer designed to provide a lightweight, non-greasy feel and water resistance in skincare and cosmetic formulations.
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
2
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-2
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
→
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
→
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
→
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
→
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
→
Safety Assessment of Polysilicone-11 as Used in Cosmetics.
Cherian P, Bergfeld WF, Belsito DV, Cohen DE, Klaassen CD et al.
International journal of toxicology, 2024
→
Safety Assessment of Polysilicone-11 as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
C20-24 Alkyl Methicone
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
C24-28 Alkyl Methicone
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
C26-28 Alkyl Methicone
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
C30-45 Alkyl Methicone
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Polysilicone-11
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
C24-28 Alkyl Methicone
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
C30-45 Alkyl Methicone
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Polysilicone-11
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Addressing the Structural Organization of Silicone Alternatives in Formulations by Molecular Dynamics Simulations and a Novel Equilibration Protocol.
Ferreira T, Loureiro A, Noro J, Cavaco-Paulo A, Castro TG
Polymers, 2023
→
Effects of silicone emulsifiers on in vitro skin permeation of sunscreens from cosmetic emulsions.
Montenegro L, Paolino D, Puglisi G
Journal of cosmetic science, 2004
→
Design and Characterization of Silicone and Surfactant Based Systems for Topical Drug Delivery.
Oyafuso MH, Carvalho FC, Chiavacci LA, Gremião MP, Chorilli M
Journal of nanoscience and nanotechnology, 2015
→
Design and Characterization of Silicone and Surfactant Based Systems for Topical Drug Delivery.
Oyafuso MH, Carvalho FC, Chiavacci LA, Gremião MP, Chorilli M
Journal of nanoscience and nanotechnology, 2015
→
Verified Jun 2026
Data: CosIng · EWG · CIR