What it is
C30-45 Alkyl Cetearyl Dimethicone Crosspolymer is a long-chain alkyl-modified silicone crosspolymer used primarily as an emulsifier for water-in-silicone systems. It helps stabilize emulsions and contributes a smooth, even texture and pleasant slip to the finished product. In sunscreens it is commonly used to keep water and silicone phases stable and to improve the way the formula spreads.
Safety & warnings
Silicone crosspolymers of this type are generally well tolerated and have a low irritation and sensitization profile in topical use. They are not associated with notable comedogenicity at customary use levels.
Origin & sourcing
Synthetic; a silicone (dimethicone) crosspolymer modified with long-chain alkyl groups, manufactured for use as a cosmetic emulsifier.
Questions everyone asks
What does this ingredient do?
It is a silicone-based emulsifier that helps blend and stabilize water and silicone phases, giving sunscreens a smooth, even, easy-to-spread texture.
Is it a silicone?
Yes. It is a modified dimethicone crosspolymer, a type of silicone used mainly for emulsifying and texturizing rather than for protection.