(2-Bromo-5-chlorophenyl)hydrazine can be used as reactant/reagent in synthetic preparation of tryptamine derivatives and use of bromine atom as a protecting group. It can also be used for preparation of amides of amino acids and analogs as antiviral agents.

(2-Bromo-5-chlorophenyl)hydrazine Hydrochloride can be used as reactant/reagent in synthetic preparation of substituted tetrahydro-1H-pyrido[4,3-b]indoles as serotonin receptors agonists and antagonists for treating metabolic, CNS, and gastrointestinal disorders.