Metronidazole USP
Metronidazole is a synthetic nitroimidazole derivative used primarily as an antibiotic for treating anaerobic bacterial and protozoal infections. It contains an unfused imidazole ring in its structure, qualifying it under HTS 2933.29.90.00 as a heterocyclic compound with nitrogen hetero-atoms only, specifically other unfused imidazole ring compounds.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If contains additional fused rings beyond unfused imidazole
Compounds with more complex heterocyclic structures move to later subheadings per chapter note on numerical order.
If imported as formulated tablets or suspensions
Medicaments in dosage form are classified in Chapter 30 based on therapeutic use, not chemical structure.
If chemically classified as antibiotics regardless of ring structure
Some antibiotics have specific provisions in heading 2941 that supersede Chapter 29 classification.
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Import Tips & Compliance
• Provide Certificate of Analysis (COA) confirming purity meets USP standards and imidazole structure verification
• Comply with FDA import requirements including Drug Master File registration for active pharmaceutical ingredients
• Avoid misclassification as finished dosage forms which fall under Chapter 30
Related Products under HTS 2933.29.90.00
Cimetidine Base
Cimetidine is an imidazole-containing histamine H2-receptor antagonist used to treat peptic ulcers and GERD. As a bulk pharmaceutical chemical with unfused imidazole ring, it falls under HTS 2933.29.90.00 for other heterocyclic compounds with nitrogen hetero-atoms only.
4-Nitroimidazole
4-Nitroimidazole serves as a synthetic intermediate for nitroimidazole antibiotics like metronidazole. Its unfused imidazole ring with nitro substitution places it under HTS 2933.29.90.00 as other nitrogen-heterocyclic compounds.
Histamine Dihydrochloride
Histamine dihydrochloride, containing imidazole ring, used in pharmaceutical standards and research. Falls under HTS 2933.29.90.00 as a chemically defined compound with unfused imidazole ring and nitrogen hetero-atoms.
2-Methylimidazole
2-Methylimidazole is an alkyl-substituted imidazole used as curing agent in epoxy resins and pharmaceutical intermediate. Classified under HTS 2933.29.90.00 for unfused imidazole ring compounds.
Clotrimazole USP
Clotrimazole is an imidazole antifungal agent containing unfused imidazole ring in its structure. Bulk API form classifies under HTS 2933.29.90.00 as other heterocyclic nitrogen compounds.
Miconazole Nitrate
Miconazole nitrate, an imidazole antifungal, contains unfused imidazole ring as key pharmacophore. The nitrate salt classifies with parent base under HTS 2933.29.90.00 per chapter salt rules.