What it is
C9-12 Alkane is a mixture of short-chain saturated hydrocarbons that gives formulas a light, dry, fast-spreading slip. It is often used as a volatile carrier or as a plant-derived alternative to lighter silicones, helping disperse UV filters and pigments evenly and leaving a non-greasy finish. Because it evaporates readily, it can improve the immediate cosmetic feel of a sunscreen without leaving heavy residue.
Safety & warnings
Saturated hydrocarbon emollients of this type are generally well tolerated and have a low likelihood of irritation. They are non-fragrance ingredients and are not associated with common contact allergens.
Origin & sourcing
It is a synthetic ingredient, frequently produced from plant-derived (such as sugarcane-fermentation or vegetable) feedstocks as well as from petroleum sources.
Questions everyone asks
Is C9-12 Alkane a silicone?
No. It is a hydrocarbon emollient, though it is often chosen as a plant-derived alternative to lightweight, volatile silicones because it provides a similar dry, fast-spreading feel.
Why is it used in sunscreens?
Its light, volatile nature helps spread the product and disperse UV filters and pigments evenly, leaving a non-greasy finish once it evaporates.