Synonyms: Potassium,(2-hydroxy-4-nitrophenoxy)-, hydrogen sulfate, potassium salt (7CI);Pyrocatechol,4-nitro-, 2-(hydrogen sulfate), dipotassium salt (8CI);Pyrocatechol, 4-nitro-,potassium deriv., 2-(hydrogen sulfate), potassium salt (6CI);Dipotassium2-hydroxy-5-nitrophenyl sulfate;Dipotassium nitrocatechol sulfate;