What it is
Diisooctyl succinate is a branched-chain ester that spreads easily and leaves a smooth, non-greasy feel on the skin. In sunscreens, especially spray and mist formats, it helps solubilize organic UV filters and other oily components while keeping the overall texture light. Its low viscosity makes it useful in atomized and quick-drying products.
Safety & warnings
Branched succinate esters of this kind are generally well tolerated and considered low-irritation in cosmetic use.
Origin & sourcing
Synthetic ester made by esterifying succinic acid with isooctyl (2-ethylhexyl-type) alcohol.
Questions everyone asks
What role does it play in sunscreen sprays?
It acts as a light emollient and solvent that dissolves oil-soluble UV filters and helps the formula dry to a smooth, non-greasy finish.
Does it leave a heavy residue?
No, it is chosen for a dry, silky skin feel rather than a greasy one.