2933.99 - Other:
Sub-classifications
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2933 9905 00
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2933 9908 00
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2933 9912 006-Bromo-5-methyl-1H-imidazo[4,5-b]- pyridine; 2-sec-Butyl-4-tert-butyl-6-(benzotriazol-2- yl)phenol; 2-tert-Butyl-4-methyl-6-(5-chlorobenzotri- azol-2-yl)phenol; 2,4-Di-tert-butyl-6-(benzotriazol-2-yl)phenol; 2,4-Di-tert-butyl-6-(5-chlorobenzotriazol-2- yl)phenol; 2,3-Dichloro-6-quinoxalinecarbonyl chloride; 1-Hydroxy-2-carbazolecarboxylic acid; 2-Hydroxy-3-carbazolecarboxylic acid; 2-Hydroxy-3-carbazolecarboxylic acid, sodium salt; Iminodibenzyl(10,11-dihydro-5H-dibenz- [b,f]azepine); Indoline; 3-Methylbenzo[f]quinoline; 2-Methylindoline; 2-Methylmercaptobenzimidazole; 1-Methyl-2-phenylindole; 1-Methylpyrazine; 2,4-Methylpyrazolic acid; 2-Phenylbenzimidazole; 2-Phenylindole; Tetramethylpyrazine; 2,3,5-Triphenyltetrazolium chloride;dl-Tryptophan; and Vinylcarbazole, monomer π©
Overview
This HTS category, 2933.99, encompasses heterocyclic compounds containing nitrogen hetero-atoms, specifically those not falling under more specific enumerations within the 2933.91 or 2933.92 subheadings. It serves as a residual category for a wide array of nitrogen-containing heterocyclic organic compounds. Classification within this heading requires careful consideration of the compound's molecular structure, specifically the presence and arrangement of nitrogen atoms within one or more ring structures, and its exclusion from more precisely defined categories.
Category 2933.99 is distinguished from its sibling, 2933.91, which exclusively lists a specific group of benzodiazepines and related derivatives, primarily known for their pharmacological applications. It also differs from 2933.92, which is dedicated to the insecticide azinphos-methyl. Therefore, goods classified under 2933.99 are those nitrogenous heterocyclic compounds that do not match the precise chemical structures or common names detailed in these specific sibling entries.
The subcategories within 2933.99 further refine the classification based on the aromaticity of the heterocyclic ring system. The "Aromatic or modified aromatic" subdivision applies to compounds where the heterocyclic ring exhibits aromatic character, such as pyridine or quinoline derivatives. Conversely, the "Other" subdivision encompasses non-aromatic or partially saturated heterocyclic compounds. This distinction is crucial for accurately categorizing these diverse organic chemicals, ensuring their correct treatment within the HTS framework.