This compound, a 7α-(9-bromononyl) derivative of estradiol, is primarily utilized in research settings for studying estrogen receptor interactions and their biological effects, leveraging the reactive bromoalkyl chain for affinity labeling and covalent modification of receptors. It is often employed in the development of novel therapeutic agents targeting hormone-dependent conditions, such as estrogen-sensitive cancers or endocrine disorders. Its structure allows it to act as a selective ligand for steroid receptors, making it valuable in biochemical assays, receptor-binding studies, and investigations of receptor dynamics. Additionally, it serves as a precursor or intermediate in the synthesis of more complex steroid derivatives, aiding in the exploration of structure-activity relationships in drug design.