This compound serves as a key intermediate in the synthesis of phenothiazine-based antipsychotic and antiemetic drugs. Featuring a 2-chlorophenothiazine core linked via an ethyl chain to a piperazine ring substituted with a 2-hydroxyethyl group, it provides a structural scaffold that interacts with dopamine D2 receptors in the brain. It is utilized in pharmaceutical research and manufacturing to develop treatments for schizophrenia, other psychotic disorders, severe agitation, anxiety, and nausea/vomiting (e.g., in chemotherapy or postoperative settings). Its design helps in creating agents with reduced side effects like extrapyramidal symptoms, though final products require strict medical oversight due to potent CNS effects.