Ethyl 3-methyl-1H-pyrazole-5-carboxylate
This ester of a pyrazole carboxylic acid features an unfused aromatic pyrazole ring, classified specifically under HTS 2933.19.37.00 per additional U.S. note 3 to section VI. The ester follows the acid's classification per chapter notes, used primarily as a pharmaceutical intermediate.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ester functionality dominates over pyrazole identification
Other aromatic pyrazoles without note 3 specificity use the general subheading.
If imported as bulk ester without heterocyclic declaration
Esters of aromatic acids may classify under oxygen-function carboxylic acid esters.
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Import Tips & Compliance
• Chapter note requires esters to follow the parent acid's heading; include structural formula in entry docs
• Test for ester hydrolysis stability during transport to prevent reclassification as free acid
• Declare exact purity level as impurities may affect 'chemically defined' status
Related Products under HTS 2933.19.37.00
3-Methyl-1-phenyl-1H-pyrazole-5-carboxylic acid
This is an aromatic pyrazole derivative featuring a pyrazole ring substituted with a phenyl group and a carboxylic acid function at the 5-position. It falls under HTS 2933.19.37.00 as a chemically defined heterocyclic compound containing an unfused pyrazole ring that is aromatic or modified aromatic, specifically listed in additional U.S. note 3 to section VI. Such compounds are typically used as intermediates in pharmaceutical synthesis.
1-(2,6-Dichlorophenyl)-1H-pyrazole-4-carbaldehyde
An aromatic pyrazole compound with a dichlorophenyl substituent and aldehyde functionality, making it a key intermediate for agrochemical synthesis. Classified under HTS 2933.19.37.00 due to its unfused pyrazole ring structure that qualifies under additional U.S. note 3 to section VI for specific aromatic pyrazoles. The heterocyclic nitrogen atoms define its primary classification.
4-Nitro-1-phenyl-1H-pyrazole
A nitro-substituted aromatic pyrazole with unfused ring structure, falling under HTS 2933.19.37.00 as specified in additional U.S. note 3 to section VI. Nitro groups on pyrazoles are classified with the parent heterocycle per chapter notes, used in dye and pharmaceutical applications.
1-Benzyl-3,5-dimethyl-1H-pyrazole
An N-benzyl substituted dimethylpyrazole that is aromatic and listed under additional U.S. note 3 to section VI, hence HTS 2933.19.37.00. This ligand precursor for coordination chemistry maintains pyrazole as principal characteristic.