Used primarily as an intermediate in the synthesis of pharmaceuticals, especially antipsychotic and antidepressant drugs. It serves as a building block in the production of phenothiazine derivatives, which are known for their central nervous system activity. Commonly found in the development of neuroleptic agents that modulate dopamine receptors. Also utilized in research settings for exploring new bioactive molecules and in the preparation of dyes and photoactive materials due to its conjugated structure and electron-donating properties.