C10H8Cl2N2O4S
323.15 g/mol
Dye & PigmentWarning
1-(2,5-Dichloro-4-sulfophenyl)-3-methyl-5-pyrazolone
CAS84-57-1EC201-541-7
Category
Dye & Pigment
Compound Class
Heterocycle
Primary Use
Dye intermediate
This compound is an organic compound used as an intermediate in the production of dyes. It features a sulfonic acid group and a pyrazolone ring, contributing to its role in dye synthesis.
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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Related Compounds
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Dye intermediate
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Dye intermediate
ReferenceSame Category
Anthraquinone
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chemical intermediate for dyes and pigments
ReferenceSame Category
2,2'-dimethylbenzidine
CAS84-67-3
intermediate for dye and pigment synthesis
ReferenceSame Category
Naphthionic acid
CAS84-86-6
Naphthalene sulfonic acid dye intermediate
ReferenceSame Category
4-hydroxy-1-naphthalenesulfonic acid
CAS84-87-7
dye intermediate
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 1-(2,5-Dichloro-4-sulfophenyl)-3-methyl-5-pyrazolone (CAS 84-57-1) is 2933.19.
HS code (international, 6-digit)
2933.19
EU CN code (8-digit)
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.
Identifiers
IUPAC Name
2,5-dichloro-4-(3-methyl-5-oxo-4H-pyrazol-1-yl)benzenesulfonic acid
InChIKey
KCEIVWKDBLAQKL-UHFFFAOYSA-N
SMILES
CC1=NN(C(=O)C1)C2=CC(=C(C=C2Cl)S(=O)(=O)O)Cl
Synonyms (21)
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