1,5-Benzodiazepine Hydrochloride can be used in silver halide emulsion sensitized with a fused diazepine. Its free base form 1,5-Benzodiazepine (CAS 265-02-1) can be used in biological study of interaction of 1,4 and 1,5-benzodiazepines with GABAA receptors of rat cerebellum granule cells in culture.