C30-45 Alkyl Dimethicone
AKA “Silicone, Alkyl Dimethicone”
Synthetic
Ingredient Facts
C30-45 alkyl dimethicone
AKA: Silicone
Synthetic · Emollient · EWG: 2
Synthetic
Emollient
Occlusive
Skin Conditioner
Silicone
Synthetic
Clean
A lightweight silicone that conditions and smooths skin, creating a soft, polished feel while helping the product glide on effortlessly.
CAS #
243137-49-7
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.
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Locks in moisture
Traditional Use
A long-chain silicone polymer created for premium cosmetic applications. Used to provide luxurious feel, improved spreadability, and enhanced water resistance.
Skin Types
●all-skin-types, gentle
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
2
CIR
Safe
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not a Sensitizer
ewg-2
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR