4-Dimethylaminopyridine (DMAP)
DMAP is a pyridine derivative serving as a nucleophilic catalyst in organic synthesis and peptide coupling reactions. Classified under HTS 2933.39.61.91 for its unfused pyridine ring and status as a controlled research chemical under U.S. note 3. Meets chapter 29 criteria as a separate chemically defined compound without excluded additives.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other pyridine derivatives not in note 3
Pyridines without specific regulatory controls classify in broader 'other' subheadings.
If classified by amine function
Importers may attempt amine classification, but pyridine ring takes precedence per chapter notes.
If imported in research kit with solvents
Laboratory reagent mixtures may classify as diagnostic/ lab reagents rather than pure compounds.
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Import Tips & Compliance
• Include Safety Data Sheet (SDS) detailing hazards (corrosive, toxic) and proper UN packaging
• Verify end-use declaration to avoid anti-dumping scrutiny on research chemicals
• Check state-level chemical handling permits beyond federal HTS requirements
Related Products under HTS 2933.39.61.91
Nicotine Bitartrate Dihydrate
Nicotine bitartrate dihydrate is a salt of nicotine, a pyridine-containing alkaloid, used in smoking cessation therapies and as an agricultural pesticide. It falls under HTS 2933.39.61.91 as a heterocyclic compound with an unfused pyridine ring, specified in additional U.S. note 3 to section VI for controlled chemical substances. The product is a chemically defined organic compound meeting chapter 29 requirements.
Pyridine-3-Carboxylic Acid (Nicotinic Acid)
Nicotinic acid, also known as vitamin B3, is a pyridine derivative used in nutritional supplements and pharmaceutical formulations. This bulk chemical powder is classified under HTS 2933.39.61.91 due to its unfused pyridine ring structure and inclusion in U.S. note 3 substances. It qualifies as a separate chemically defined organic compound per chapter notes.
Pyridine Hydrochloride
Pyridine hydrochloride is the salt form of pyridine used in chemical synthesis and as a reagent for protein extraction. It falls under HTS 2933.39.61.91 as a heterocyclic nitrogen compound with unfused pyridine ring, classified with the parent base per chapter note on salts. The pure salt meets chemically defined compound criteria.
2,6-Lutidine (2,6-Dimethylpyridine)
2,6-Lutidine is a dimethyl-substituted pyridine used as a solvent, catalyst ligand, and synthetic intermediate. This bulk chemical classifies under HTS 2933.39.61.91 due to its unfused pyridine ring structure and inclusion in section VI note 3 substances. Qualifies as chemically defined per chapter 29 scope.
4-Phenylpyridine
4-Phenylpyridine serves as an intermediate for pharmaceuticals and liquid crystal materials, featuring an unfused pyridine ring with phenyl substitution. Classified in HTS 2933.39.61.91 as a note 3 substance meeting heterocyclic nitrogen compound criteria. Chemically defined without excluded Chapter 29 mixtures or preparations.
Ethyl Nicotinate
Ethyl nicotinate, the ethyl ester of nicotinic acid, is used in topical rubefacients and as a pharmaceutical intermediate. Falls under HTS 2933.39.61.91 as pyridine derivative ester classified with parent acid per chapter notes on esters. Meets chemically defined organic compound requirements.