Aminophylline USP Powder
Aminophylline is a heterocyclic compound containing a xanthine (purine) structure with pyrimidine rings, used as a bronchodilator drug for asthma treatment. It falls under HTS 2933.59.53.00 as an aromatic drug with pyrimidine hetero-atoms in its structure. This classification applies to its chemically defined organic nature per Chapter 29 notes.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as caffeine derivative without primary drug intent
Xanthines like theophylline base may shift to heading 2939 for other heterocyclic drugs if not explicitly pharmaceutical.
If imported as formulated medicine rather than bulk API
Bulk powders become medicaments under Chapter 30 when mixed or prepared for therapeutic use.
If for non-aromatic or unmodified versions
Heading 2932 covers other nitrogen heterocyclics if lacking pyrimidine ring or aromatic modification.
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Import Tips & Compliance
• Obtain FDA Drug Master File and ensure compliance with 21 CFR import regulations for bulk APIs
• Provide Certificate of Analysis (CoA) verifying purity and aromatic structure; avoid misclassification as non-drug
Related Products under HTS 2933.59.53.00
Trimetrexate Glucuronate
Trimetrexate is a folic acid antagonist with pyrimidine structure, used in cancer therapy. Imports as HTS 2933.59.53.00 aromatic drug with salts classified to acid per note 5(C). Heterocyclic nitrogen-only per notes.
Oteracil Potassium Salt
Oteracil is a pyrimidine derivative in cancer drugs like S-1, inhibiting toxicity. HTS 2933.59.53.00 for aromatic pyrimidine drugs; salts to organic base per notes. Chemically defined per Chapter 29.
Pyrimethamine Base
Pyrimethamine is an antifolate drug with aromatic pyrimidine ring, used for malaria. HTS 2933.59.53.00 covers this as other aromatic pyrimidine drug. Pure compound fits Chapter 29(a) definition.
Theophylline Anhydrous API
Theophylline is a methylxanthine drug with fused pyrimidine-imidazole rings, used for respiratory disorders. Classified in HTS 2933.59.53.00 due to its aromatic pyrimidine structure and status as a pharmaceutical drug. Meets Chapter 29 criteria for separate chemically defined compounds.
Dipyridamole Powder
Dipyridamole is an aromatic antiplatelet drug featuring pyrimidine rings in its heterocyclic structure. It imports under HTS 2933.59.53.00 as a modified aromatic drug with nitrogen hetero-atoms only in pyrimidine form. Qualifies as a separate organic compound per Chapter 29 scope.
Idoxuridine Crystals
Idoxuridine is a pyrimidine nucleoside analog used as antiviral drug, with iodinated aromatic structure. Falls under HTS 2933.59.53.00 for aromatic pyrimidine drugs per hierarchy. Exclusively heterocyclic with nitrogen hetero-atoms as defined.