Hexanoic acid, also known as caproic acid, is a six-carbon saturated fatty acid found in animal fats and oils, as well as in some plant oils. It has a rancid odor and is used in the production of esters for artificial flavorings and fragrances. In food, it contributes to the flavor profile of dairy products and is a component of some cheeses. Hexanoic acid is also used in the synthesis of various chemicals and as a surfactant. Its sensory characteristics include a strong, unpleasant smell at high concentrations, but it can enhance flavor at lower levels. It is recognized for its potential health benefits, including antimicrobial properties.