10-Oxooctadecanoic acid is a specialty chemical, specifically a long-chain keto fatty acid, used primarily as an intermediate in organic synthesis for producing other specialty compounds in industrial and pharmaceutical applications. It is also employed in biochemical research to study lipid metabolism, fatty acid oxidation pathways, and cellular signaling mechanisms. While its structure resembles natural fatty acids with potential emollient properties, established uses in commercial cosmetics, skincare, or hair care products are limited and mostly investigational.