Synonyms: 1,2-Hydrazinedisulfonic acid, 1-(4-nitrophenyl)-, potassium salt (1:2);1,2-Hydrazinedisulfonic acid, 1-(4-nitrophenyl)-, dipotassium salt;Dipotassium 1-(4-nitrophenyl)-1,2-hydrazodisulphonate;dipotassium 1-(4-nitrophenyl)hydrazine-1,2-disulfonate