Purine
Purine is a fundamental aromatic heterocyclic compound forming the basis of adenine and guanine nucleobases. Falls under HTS 2934.99.44.00 as other aromatic heterocyclic compounds. Critical for nucleic acid research and pharmaceutical intermediates.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified under imidazole derivatives due to ring structure
Purine's imidazole ring might trigger heading 2933 classification per chapter notes.
If imported as sugar derivative or nucleoside precursor
Sugar-modified heterocycles classified later in numerical order per chapter rules.
If put up in dosage form for research
Immunological or diagnostic preparations containing the compound fall to Chapter 30.
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Import Tips & Compliance
• Submit structural formula and CAS (120-73-0) documentation to confirm classification as chemically defined compound
• Segregate from nucleosides/nucleotides to avoid Chapter 2934 nucleic acid headings
• Monitor for anti-dumping duties if sourced from specific countries
Related Products under HTS 2934.99.44.00
Quinazoline
Quinazoline is a bicyclic aromatic heterocyclic compound with a fused benzene and pyrimidine ring, classified under HTS 2934.99.44.00 as an other aromatic heterocyclic compound. It serves as a key intermediate in pharmaceutical synthesis for drugs targeting cancer and neurological disorders.
Pteridine
Pteridine is a fused heterocyclic system containing pyrimidine and pyrazine rings, essential for biochemical research and vitamin synthesis. Classified under HTS 2934.99.44.00 as an aromatic heterocyclic compound not elsewhere specified. Used in folate and flavin coenzyme production.
1,8-Naphthyridine
1,8-Naphthyridine is a rigid bicyclic aromatic system used in coordination chemistry and antibiotic synthesis. Classified under HTS 2934.99.44.00 as other aromatic heterocyclic compounds. Its chelating properties make it valuable for metal complex formation.
Phenanthroline
1,10-Phenanthroline is a tricyclic aromatic heterocyclic compound famous for its metal chelation properties in analytical chemistry. Classified under HTS 2934.99.44.00 as other aromatic heterocycles. Widely used to form colored complexes with iron(II) for titration.
Acridine
Acridine is a tricyclic aromatic heterocycle with a central pyridine ring, used in dye chemistry and antimalarial drug development. Falls under HTS 2934.99.44.00 as other aromatic heterocyclic compound. Exhibits fluorescence properties valuable for biological staining.
Xanthine
Xanthine is a purine base and key intermediate in caffeine and theophylline biosynthesis. Classified under HTS 2934.99.44.00 as an aromatic heterocyclic compound. Pharmaceutical precursor for bronchodilators and stimulants.