sodium 2,5-dichloro-4-(1,3-dihydro-5,7-dinitro-3-oxo-2H-indazol-2-yl)benzenesulphonate

2,5-Dichloro-4-[(1,3-dihydro-5,7-dinitro-3-oxo-2H-indazol)-2-yl]benzenesulfonic acid sodium salt