Synonyms: [1,1'-Biphenyl]-2,2'-disulfonicacid, 4,4'-bis[[1-(3-aminophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-,disodium salt, reaction products with2,2'-[1,2-ethanediylbis(oxymethylene)]bis[oxirane],2',4',5',7'-tetrabromo-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-onedisodium salt and2',4',5',7'-tetrabromo-4,5,6,7-tetrachloro-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-onedisodium salt