Dioctyl adipate (DOA) is an organic compound with the formula (CH<sub>2</sub>CH<sub>2</sub>CO<sub>2</sub>C<sub>8</sub>H<sub>17</sub>)<sub>2</sub>. It is a colorless oily liquid . As well as related diesters derived from 2-ethylhexanol, decanol, isodecanol, etc., it is used as a plasticizer.
DEHA is sometimes incorrectly called dioctyl adipate. The abbreviation DOA has also been used for bis(2-ethylhexyl) adipate (CAS # 103-23-1).
Esters of adipic acid exhibit low acute toxicities in animal models. The LD<sub>50</sub> of the related ethylhexanoate is estimated at 900 mg/kg (rat, i.v.).