2-Chloro-5-sulfophenylmethylpyrazolone
This is a specific aromatic pyrazolone derivative containing a chlorine and sulfonic acid group on a phenyl ring attached to a pyrazole structure. It falls under HTS 2933.19.18.00 as one of the explicitly named heterocyclic compounds with an unfused pyrazole ring that is aromatic or modified aromatic. Primarily used as an intermediate in dye synthesis and pharmaceutical production.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing a pyrimidine ring instead of pyrazole
Pyrimidine heterocyclic compounds fall under heading 2934, which occurs later in numerical order per chapter note.
If formulated as synthetic dye for retail packaging
Dye preparations put up for retail sale are excluded from Chapter 29 and classified under heading 3204.
If imported as a prepared chemical mixture or solution
Mixtures exceeding Chapter 29 scope, like diluted solutions for specific uses, go to Chapter 38 preparations.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide detailed chemical analysis certificates confirming purity and structure; ensure proper UN hazardous material labeling for sulfonic acid content; avoid misclassification by verifying pyrazole ring integrity
Related Products under HTS 2933.19.18.00
2,5-Dichloro-4-(3-methyl-5-oxo-2-pyrazolin-1-yl) benzenesulfonic acid
A complex aromatic pyrazolone featuring dichloro substitution and a sulfonic acid on a benzene ring linked to a pyrazoline structure. Classified under HTS 2933.19.18.00 as a specifically listed compound with an unfused pyrazole ring (hydrogenated form). Used in manufacturing azo dyes and pigments.
Phenyl carbethoxypyrazolone
An ester derivative of pyrazolone with a phenyl group and ethoxycarbonyl substituent on the heterocyclic ring. It matches HTS 2933.19.18.00 as a named aromatic pyrazolone compound with unfused pyrazole ring. Serves as a key intermediate in pharmaceutical synthesis, particularly for analgesics.
m-Sulfaminopyrazolone (m-Sulfamido-phenyl methyl pyrazolone)
This compound features a sulfamido group at the meta position of a phenyl ring attached to a methylpyrazolone structure. Explicitly listed under HTS 2933.19.18.00 for its aromatic pyrazole ring system. Commonly used in the production of reactive dyes for textiles.
1-(p-Sulfophenyl)-3-methyl pyrazolone
A pyrazolone derivative with a para-sulfophenyl substituent at position 1 and methyl at position 3 on the unfused pyrazole ring. Classified in HTS 2933.19.18.00 as a specifically enumerated aromatic heterocyclic compound. Widely employed as a coupler in azo dye manufacturing.