Used primarily in the pharmaceutical industry as an intermediate in the synthesis of various drugs, particularly those targeting central nervous system disorders. It plays a crucial role in the development of antipsychotic and antihistamine medications due to its structural properties, which allow for effective binding to specific receptors. Additionally, it is utilized in research settings to study the mechanism of action of phenothiazine derivatives and their potential therapeutic applications. Its chemical stability and reactivity make it a valuable component in organic synthesis for creating complex molecules with potential medicinal benefits.