Ethyl 5-oxo-1-phenyl-1H-pyrazole-3-carboxylate
Pyrazole carboxylate ester intermediate for photographic dye-formers and developers. The unfused pyrazole ring with aromatic modification qualifies under HTS 2933.19.30.95.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If oxygen heterocycle function emphasized
Pyrazolone tautomer form may classify as oxygen-containing heterocycle.
If ethyl esters of aromatic carboxylic acids
Ester classification follows parent acid under Chapter 29 note rules.
If technical mixtures with solvents
Solvent-dissolved preparations for safety classify as chemical preparations.
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Import Tips & Compliance
• Provide esterification certificates confirming Chapter 29 note A ester classification rules
• Include HPLC purity reports (>95%) for statistical reporting requirements
• Ensure proper venting for ethyl ester volatile compound shipments
Related Products under HTS 2933.19.30.95
1-Phenyl-3-methyl-5-pyrazolone
A pyrazole derivative used as a key intermediate in the synthesis of photographic developers and dyes. This aromatic heterocyclic compound contains an unfused pyrazolone ring structure, qualifying it under HTS 2933.19.30 for photographic chemicals with pyrazole rings.
4-Amino-1-phenyl-3-pyrazolidinone
Pyrazolidinone derivative serving as a developing agent in black-and-white photographic processing. Its unfused pyrazole ring and aromatic substitution place it specifically under HTS 2933.19.30.95 for photographic chemicals.
3-Methyl-1-p-sulophenyl-5-pyrazolone
Sulfonated pyrazolone used in color photographic coupler chemistry and dye synthesis. The aromatic-modified pyrazole ring structure fits HTS 2933.19.30.95 specifications for photographic chemicals.
1-(2,4,6-Trichlorophenyl)-5-pyrazolone-3-carboxylic Acid
Chlorinated aromatic pyrazolone carboxylic acid used in specialty photographic sensitizers. Falls under HTS 2933.19.30.95 due to unfused pyrazole ring and photographic chemical designation.