Used as a key intermediate in the synthesis of phenothiazine-based pharmaceuticals, particularly in the development of antipsychotic and antihistaminic drugs. Its structure supports electron transfer properties, making it useful in some organic electronic applications. Also employed in research for photoredox catalysis due to its light-induced redox activity. Shows potential in dye-sensitized solar cells as a donor material because of its stable radical cation formation. Additionally, utilized in analytical chemistry as a derivatizing agent for detecting carbonyl compounds.