Pyrazolone Red Dye Intermediate
Pyrazolone Red Dye Intermediate is a substituted pyrazole compound used in azo dye coupling reactions for textile and ink applications. Classified HTS 2933.19.90.00 as unfused pyrazole 'other' per Chapter Note excluding only retail coloring matter.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-coupled into finished disperse dye
Synthetic organic disperse dyes classified under Chapter 32 regardless of heterocyclic content.
If reactive dye containing pyrazole moiety
Reactive dyes specifically provided for in 3204.16 take precedence over Chapter 29.
If supplied as formulated print paste additive
Prepared textile printing pastes containing dye intermediates classified as chemical preparations.
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Import Tips & Compliance
• Distinguish 'dye intermediate' vs 'prepared dye' - intermediates remain Chapter 29
• Include coupling reaction specifications and purity certificate (>95% HPLC)
• Colorants require stability testing data for transportation classification
Related Products under HTS 2933.19.90.00
3-Amino-1-phenylpyrazole
3-Amino-1-phenylpyrazole is a heterocyclic compound containing an unfused pyrazole ring with an amino group at position 3 and phenyl substituent at nitrogen 1. It falls under HTS 2933.19.90.00 as a pyrazole derivative not specifically enumerated elsewhere in the subheading. Used primarily as an intermediate in pharmaceutical and agrochemical synthesis.
4-Nitro-1H-pyrazole
4-Nitro-1H-pyrazole contains an unfused pyrazole ring with nitro group substitution at position 4, qualifying as a nitrogen-heterocyclic compound under heading 2933. Classified in 2933.19.90.00 as 'other' pyrazole derivative. Used in synthesis of explosives, pharmaceuticals, and energetic materials.
3,5-Dimethylpyrazole
3,5-Dimethylpyrazole features methyl groups at positions 3 and 5 of the unfused pyrazole ring, fitting HTS 2933.19.90.00 as an 'other' pyrazole compound. Primarily used as a nitrification inhibitor in agricultural fertilizers and as a ligand in coordination chemistry.
4-Aminoantipyrine
4-Aminoantipyrine (4-amino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one) contains unfused pyrazolone ring structure, classified HTS 2933.19.90.00 as other pyrazole compound. Widely used as analytical reagent for phenol detection and cholesterol determination in clinical labs.
Ceftriaxone Sodium Impurity A (Pyrazole Intermediate)
Ceftriaxone Sodium Impurity A is a pyrazole-containing synthetic intermediate used in cephalosporin antibiotic production, classified under HTS 2933.19.90.00 as other unfused pyrazole compound. Meets Chapter 29 definition for separate chemically defined organic compounds.
1H-Pyrazole-3-carboxylic Acid
1H-Pyrazole-3-carboxylic acid contains both unfused pyrazole ring and carboxylic acid function, classified under HTS 2933.19.90.00 with heterocyclic heading taking precedence. Used in pharmaceutical synthesis and agrochemical production.