Used primarily as an estrogen receptor modulator in pharmaceutical research, particularly in the development of selective estrogen receptor modulators (SERMs). It serves as an intermediate in synthesizing compounds with tissue-selective estrogenic or anti-estrogenic activity, useful in treating hormone-related conditions such as breast cancer, osteoporosis, and infertility. Its structure allows modulation of estrogen receptor activity in specific tissues, making it valuable in creating drugs that target estrogen-dependent pathways without affecting other tissues. Also employed in analytical studies to understand receptor binding and pharmacokinetics of related therapeutic agents.