What it is
C30-45 Alkyl Methicone is a silicone modified with long C30 to C45 alkyl chains, giving it wax-like behavior at room temperature. In sunscreens it helps form a uniform, cohesive film on the skin and improves the spreadability and after-feel of the product. It is frequently used alongside other silicone waxes to structure emulsions and enhance the deposition of UV filters and pigments.
Safety & warnings
Silicone alkyl waxes such as C30-45 Alkyl Methicone are generally considered low-irritation and well tolerated. They are large, inert molecules that remain on the skin surface and have a low likelihood of causing sensitization.
Origin & sourcing
C30-45 Alkyl Methicone is a synthetic silicone-based material made by attaching long-chain alkyl groups to a methicone (methyl silicone) backbone.
Questions everyone asks
Why is C30-45 Alkyl Methicone used in sunscreens?
It helps form a smooth, even film on the skin and improves how the product spreads and feels, which supports uniform application of UV filters.
Is it a silicone?
Yes, it is a silicone wax made by adding long alkyl chains to a methicone backbone, giving it a solid, wax-like character.