What it is
Diethylhexyl sebacate is the diester of sebacic acid and 2-ethylhexanol, a clear, low-viscosity oil. It acts as an emollient and a good solubilizer for oil-soluble UV filters and pigments, helping them dissolve and disperse evenly. Its light, slip-rich texture and quick, dry-touch finish make it popular in modern fluid sunscreens.
Safety & warnings
This ester is widely used and generally well tolerated with a low irritation and sensitization profile. As a light, fast-spreading ester it is considered low on the comedogenicity scale, though very acne-prone users may still wish to patch test rich formulas.
Origin & sourcing
Synthetic ester produced by esterifying sebacic acid with 2-ethylhexanol; sebacic acid is often sourced from castor oil, so the raw materials can be partly plant-derived.
Questions everyone asks
Why is diethylhexyl sebacate used in sunscreens?
It dissolves oil-soluble UV filters, spreads them evenly, and leaves a light, dry, non-greasy finish.
Is it greasy on the skin?
No. It is a low-viscosity ester chosen specifically for its light slip and quick, dry-touch feel.