What it is
Ethylhexyl isononanoate is a clear, low-viscosity ester formed from 2-ethylhexanol and isononanoic acid. It spreads easily, leaving a silky, dry-touch feel, and helps wet and disperse pigments and oil-soluble UV filters. These properties make it a common choice in lightweight sunscreens, sticks, and tone-up formulas.
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 sits low on the comedogenicity scale, though very acne-prone users may wish to patch test richer formulas.
Origin & sourcing
Synthetic ester produced by esterifying isononanoic acid with 2-ethylhexanol.
Questions everyone asks
What does ethylhexyl isononanoate do in sunscreen?
It is a light emollient that spreads UV filters and pigments evenly and leaves a silky, dry, non-greasy finish.
Is it heavy or oily-feeling?
No. It is a low-viscosity ester chosen for its light slip and dry-touch finish.