Ethyl (E,Z)-2,4-decadienoate, commonly known as pear ester, is a polyunsaturated fatty acid ester responsible for the characteristic aroma of ripe pears. It occurs naturally in fruits such as pears, apples, and quince. This compound is widely used in the flavor and fragrance industry to impart fruity, pear-like notes in food products, beverages, and perfumes. It exhibits a low odor threshold, making it effective at low concentrations. Chemically, it features conjugated double bonds in the (2E,4Z) configuration, contributing to its stability and sensory properties. It is approved for food use and synthesized via esterification of 2,4-decadienoic acid with ethanol.