C.I. Acid Orange 137

1-(4-Sulfophenyl)-3-ethylcarboxyl-4-(4-sulfonaphthylazo)-5-hydroxypyrazole Disodium Salt

15139-76-1 [RN]

1H-pyrazole-3-carboxylic acid, 5-hydroxy-4-[(E)-2-(4-sulfo-1-naphthalenyl)diazenyl]-1-(4-sulfophenyl)-, 3-ethyl ester, sodium salt (1:2)

4,5-Dihydro-5-oxo-4-[(4-sulfo-1-naphthalenyl)azo]-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylic Acid 3-Ethyl Ester Disodium Salt

5-Hydroxy-4-[(4-sulfo-1-naphthalenyl)azo]-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylic Acid 3-Ethyl Ester Disodium Salt

5-Oxo-4-[(4-sulfo-1-naphthyl)azo]-1-(p-sulfophenyl)-2-pyrazoline-3-carboxylicAcid 3-Ethyl Ester Disodium Salt

C.I. Acid Orange 137

Disodium 4-{(E)-[3-(ethoxycarbonyl)-5-hydroxy-1-(4-sulfonatophenyl)-1H-pyrazol-4-yl]diazenyl}-1-naphthalenesulfonate

Disodium 4-{(E)-[3-(ethoxycarbonyl)-5-hydroxy-1-(4-sulfonatophenyl)-1H-pyrazol-4-yl]diazenyl}naphthalene-1-sulfonate

239-201-5 [EINECS]

C.I. 19235 [DBID]