4-Chloro-3-(3-methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid
4-Chloro-3-(3-methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid is a complex chlorosulfonic pyrazole derivative featuring an unfused pyrazole ring with aromatic substitution. It is used primarily as a high-performance dye coupling agent. As a separate chemically defined organic compound with a nitrogen hetero-atom ring, it falls under tariff item 2933.19.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a synthetic organic colouring matter
Chapter 29 note 2(g) excludes colouring matter of heading 32.04.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is imported as a pure chemical compound, not in a formulation that could shift classification
• Have the technical data sheet and CAS number ready for CBSA verification
• Confirm whether the dye coupling use triggers any end-use or chemical import reporting requirements
Related Products under Tariff item 2933.19.00
1-(2',5'-Dichlorophenyl)-3-methyl-2-pyrazolin-5-one
> 1-(2',5'-Dichlorophenyl)-3-methyl-2-pyrazolin-5-one is a chemically defined compound with an unfused pyrazole ring and dichlorophenyl substitution. It is used in specialty azo dyes and pharmaceutical synthesis. This product is classified under tariff item 2933.19.00 as an "Other" compound.
1-(m-Chlorophenyl)-3-methyl-2-pyrazolin-5-one
> 1-(m-Chlorophenyl)-3-methyl-2-pyrazolin-5-one is a chemically defined compound with an unfused pyrazole ring and chlorophenyl substitution. It is used as a dye intermediate and in pharmaceutical synthesis. This product is classified under tariff item 2933.19.00 as an "Other" compound.
1-(o-Ethylphenyl)-3-methyl-2-pyrazolin-5-one
> 1-(o-Ethylphenyl)-3-methyl-2-pyrazolin-5-one is a chemically defined compound with an unfused pyrazole ring and ethylphenyl substitution. It is employed in dye chemistry and polymer additives. This product is classified under tariff item 2933.19.00 as an "Other" compound.
1-(p-Sulfophenyl)-3-methyl pyrazolone
1-(p-Sulfophenyl)-3-methyl pyrazolone is a pyrazolone derivative with a para-sulfophenyl substituent at position 1 and methyl at position 3 on the unfused pyrazole ring. It is used as a dye intermediate and coupling agent. Its aromatic heterocyclic structure qualifies it for tariff item 2933.19.00.
2,4-Methylcarboxypyrazolic acid
> 2,4-Methylcarboxypyrazolic acid is a chemically defined compound with an unfused pyrazole ring and carboxy substitution. It is used in fine chemical synthesis. This product is classified under tariff item 2933.19.00 as an "Other" compound.
2,5-Dichloro-4-(3-methyl-5-oxo-2-pyrazolin-1-yl) benzenesulfonic acid
2,5-Dichloro-4-(3-methyl-5-oxo-2-pyrazolin-1-yl) benzenesulfonic acid is a complex aromatic pyrazolone featuring dichloro substitution and a sulfonic acid on a benzene ring linked to a pyrazoline structure. It is used as a dye intermediate. Its unfused pyrazole ring qualifies it for tariff item 2933.19.00.