C30-45 Alkyldimethylsilyl Polypropylsilsesquioxane
AKA “Silicone Resin, Polypropylsilsesquioxane
Synthetic
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Ingredient Facts
C30-45 alkyldimethylsilyl polypropylsilsesquioxane
AKA: Silicone Resin
Synthetic · Film Forming | Skin Conditioning | Emollient · EWG: 4
Synthetic
Emollient
Occlusive
Skin Conditioner
Silicone
Synthetic
Clean
Science: Functions: Film Forming Safety Ratings: CIR: Safe as used
CAS #
-
Form
Powder
Synthetic
Synthetic. Synthesized from alkyl silicones and polypropylsilsesquioxane polymers, belonging to the silicone chemical family. Produced through condensation polymerization of siloxane monomers with alkyl chains and propyl groups.
Function
Film Forming | Skin Conditioning | Emollient
Benefits
Creates Protective Barrier
Traditional Use
A modern silicone polymer developed for the cosmetics industry in the late 20th century to provide enhanced conditioning, smoothing, and anti-stick properties in makeup and skincare products.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR
C30-45 Alkyldimethylsilyl Polypropylsilsesquioxane — Duck Heart Ghost