1-(4-Sulfophenyl)-3-ethylcarboxy-4-(4-sulfonaphthylazo)-5-hydroxypyrazole disodium 15139-76-1 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-4-((4-sulfo-1-naphthalenyl)azo)-1-(4-sulfophenyl)-, 3-ethyl ester, disodi 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-4-((4-sulfo-1-naphthalenyl)azo)-1-(4-sulfophenyl)-, 3-ethyl ester, disodium salt 2-Pyrazoline-3-carboxylic acid, 5-oxo-4-((4-sulfo-1-naphthyl)azo)-1-(P-sulfophenyl)-, 3-ethyl ester, disodium salt 2-Pyrazoline-3-carboxylic acid, 5-oxo-4-((4-sulfo-1-naphthyl)azo)-1-(p-sulfophenyl)-, 2-ethyl ester, disodium salt 3-Ethyl 4,5-dihydro-5-oxo-4-((4-sulfo-1-naphthalenyl)azo)-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylate disodium salt 53060-70-1 Acid Orange 137 C.I. Acid Orange 137 Disodium 1-(4-sulfophenyl)-3-ethylcarboxy-4-(4-sulfonaphthylazo)-5-hydroxypyrazole Disodium 3-ethyl 4,5-dihydro-5-oxo-4-((4-sulfo-1-naphthalenyl)azo)-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylate Disodium 3-ethyl 4,5-dihydro-5-oxo-4-((4-sulphonato-1-naphthyl)azo)-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate Disodium 3-ethyl 5-oxo-4-((4-sulfo-1-naphthyl)azo)-1-(p-sulfophenyl)-2-pyrazoline-3-carboxylate EINECS 239-201-5 Ethyl 5-oxo-4-(4-sulfonaphthylazo)-1-(p-sulfophenyl)-2-pyrazoline-3-carboxylate disodium salt ORANGE B