ML239 is primarily used in biological research to study cellular processes related to lipid metabolism. It is known to inhibit the activity of stearoyl-CoA desaturase 1 (SCD1), an enzyme involved in the synthesis of monounsaturated fatty acids. This inhibition makes ML239 a valuable tool for investigating the role of SCD1 in various metabolic disorders, such as obesity, diabetes, and cancer. Researchers utilize ML239 to explore potential therapeutic strategies targeting lipid metabolism pathways, providing insights into disease mechanisms and potential drug development. Its application extends to in vitro and in vivo studies, where it helps elucidate the physiological and pathological roles of SCD1 in cellular and organismal contexts.