Idoxuridine Crystals
Idoxuridine is a halogenated pyrimidine nucleoside antiviral with nitrogen-only heteroatoms in the ring structure. It qualifies for HTS 2933.59.95.00 as an 'other' pyrimidine compound under Chapter 29 for chemically defined heterocycles. Used in ophthalmic formulations but imported as pure API.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing additional lactam structure
Lactam heterocycles classify under 2933.79, differing from pure pyrimidine.
If for topical ophthalmic preparations
Finished medicaments for retail classify in Chapter 30.
If declassified as primarily halogenated hydrocarbon
Heavy halogen substitution may shift to acyclic derivatives in 2903.
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Import Tips & Compliance
• Include spectral analysis confirming pyrimidine ring; halogen derivatives stay in Chapter 29
• Comply with biohazard labeling if antiviral activity noted
Related Products under HTS 2933.59.95.00
Aminophylline USP Powder
Aminophylline is a theophylline derivative containing a hydrogenated pyrimidine ring structure, used as a bronchodilator for respiratory conditions. It falls under HTS 2933.59.95.00 as a heterocyclic compound with nitrogen hetero-atoms only, specifically in the 'other' category for pyrimidine ring compounds. This classification applies to its pure chemical form for pharmaceutical use.
Flucytosine API
Flucytosine is a fluorinated pyrimidine analog used as an antifungal agent, featuring a pyrimidine ring with nitrogen hetero-atoms only. Classified under HTS 2933.59.95.00 for other pyrimidine ring compounds not specified elsewhere. Its chemical definition fits Chapter 29 restrictions for separate organic compounds.
Pyrimethamine Base
Pyrimethamine is a diaminopyrimidine antimalarial drug featuring a pyrimidine ring with nitrogen hetero-atoms only. Classified in HTS 2933.59.95.00 as other pyrimidine compounds, adhering to Chapter 29 for pure organic chemicals. Imported as API for tablet manufacturing.
Trifluridine Pure Powder
Trifluridine, a trifluorinated thymidine analog, contains a pyrimidine ring with only nitrogen hetero-atoms, fitting HTS 2933.59.95.00 for other such compounds. This antiviral API is a separate chemically defined organic compound per Chapter 29 notes. Primarily used in eye drop formulations.
Sulfadiazine Technical Grade
Sulfadiazine contains a pyrimidine ring (as part of diazine) with nitrogen hetero-atoms only, used as sulfonamide antibiotic API. Falls under HTS 2933.59.95.00 for other pyrimidine compounds per Chapter 29 chemical definitions. Excludes sulfonated derivatives per notes.