YF-2 hydrochloride is primarily utilized in biochemical and pharmacological research due to its role as a selective inhibitor. It is often employed in studies targeting specific enzymes or receptors to understand their function and regulation in biological systems. Researchers use it to investigate pathways involved in cellular signaling, which can provide insights into disease mechanisms and potential therapeutic targets. Its application extends to drug discovery, where it helps in the development of compounds that modulate particular biological activities. Additionally, YF-2 hydrochloride is used in experimental models to evaluate its efficacy and safety, contributing to the advancement of novel treatments for various medical conditions.