(4-Bromophenyl)thiourea

(4-Bromophenyl)thiourea is an oxidant that has been used in the commercialization of photographic films and perovskites. It can be used as a biological stain to detect proteins, and contains both UV-A and UV-B spectra. This chemical is also able to convert ammonium nitrate into nitric acid, which has been shown to be synergistic with thiourea. (4-Bromophenyl)thiourea can exist as two isomers, cis and trans, which have different properties. The cis isomer reacts faster than the trans isomer with ammonia, but the trans form has greater solubility in water. The techniques for separating these two forms are chromatography and crystallization.