Synonyms:
4,5-dihydro-5-oxo-4-((3-phosphonophenyl)azo)-1-(4-sulfophenyl)-1h-pyrazole-3-carboxylic acid, monosodium salt ; sodium trihydrogen 4,5-dihydro-5-oxo-4-[(3-phosphonatophenyl)azo]-1-(4-sulfonatophenyl)-1h-pyrazole-3-carboxylate ; sodium trihydrogen 4,5-dihydro-5-oxo-4-[(3-phosphonatophenyl)azo]-1-(4-sulphonatophenyl)-1h-pyrazole-3-carboxylate