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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If specifically named in statistical suffix
Certain pyrimidines have dedicated subheadings; check HTS updates for exact matches.
If classified as antibiotics or derivatives
Antifungal nucleoside analogs may fall under heading 2941 for antibiotics.
If imported as mixture with solvents for safety
Solutions for transport per Chapter 29 note (e) classify in 3824 if not pure compound.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Submit FDA Drug Master File (DMF) references; misdeclaration as generic chemical leads to penalties
• Verify fluorine substitution doesn't trigger Chapter 28 inorganic classification
• Avoid mixing with excipients; pure form only for this HTS
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.
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.
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.
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.