What it is
This is a mixture of branched and linear alkanes in the C13 to C15 range, prized for a very light, fast-spreading, non-greasy skin feel. It is often used as a renewable or plant-derived alternative to traditional mineral-oil-type emollients and silicones. In sunscreens it improves spreadability and texture and can help disperse UV filters, but it does not provide UV protection itself.
Safety & warnings
C13-15 alkane is generally well tolerated and considered a lightweight, low-irritation emollient. Its light texture makes it a popular choice in formulas aiming for a non-greasy finish.
Origin & sourcing
Available as a synthetic hydrocarbon and increasingly as a plant-derived version made from renewable sources.
Questions everyone asks
What does C13-15 Alkane do in sunscreen?
It is a light emollient and solvent that improves spreadability and skin feel and can help disperse UV filters. It is not itself a UV filter.
Is C13-15 Alkane plant-derived?
It is available both as a synthetic hydrocarbon and as a plant-derived version made from renewable sources, depending on the supplier.