This compound is a sulfonic acid derivative containing a pyrazolone ring with an ethoxycarbonyl substituent. It is primarily used as an intermediate in the production of dyes.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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1-(2,5-Dichloro-4-sulfophenyl)-5-oxo-4,5-dihydro-1H-pyrazole-3-carboxylic acid
Dye intermediate
Dichlorosulfophenyl-3-methylpyrazolone
Dye intermediate
2-Methyinaphtho[1,2-d]thiazole
Dye intermediate
8-amino-1,3,6-naphthalenetrisulfonic acid
Dye intermediate
Acid Red 151
synthetic acid dye
Fast Black K salt hemi zinc chloride
Dye salt for textile coloring
Acid Violet 90
Acid dye for textiles
Acid Red 183
acid dye for textiles
The international HS code for 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-, 3-ethyl ester (CAS 6402-06-8) is 2933.19.
2933.19
2933 19 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
4-(3-ethoxycarbonyl-5-oxo-4H-pyrazol-1-yl)benzenesulfonic acid
ODFCMJFINVPRFA-UHFFFAOYSA-N
CCOC(=O)C1=NN(C(=O)C1)C2=CC=C(C=C2)S(=O)(=O)O
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