Metronidazole USP
Metronidazole is a synthetic nitroimidazole derivative classified as a drug under HTS 2933.29.4500 due to its unfused imidazole ring structure and primary use as an antibiotic. It treats anaerobic bacterial infections, protozoal infections like trichomoniasis, and certain gastrointestinal conditions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not explicitly designated as 'drugs'
Non-drug imidazole compounds fall under the general 'other' subcategory rather than the specific drugs provision.
If imported as finished tablets or capsules
Medicaments in dosage form containing the API are classified in Chapter 30 based on therapeutic use rather than chemical structure.
If containing a pyrimidine ring instead of imidazole
Pyrimidine heteroatom structure shifts classification within the same chapter to different subheading.
Not sure which classification is right?
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Import Tips & Compliance
• Obtain FDA Drug Master File (DMF) and ensure compliance with USP standards for purity and impurities
• Provide Certificate of Analysis (CoA) and stability data; common pitfall is inadequate microbial testing documentation
• Verify bulk API status vs finished dosage forms to avoid misclassification under Chapter 30
Related Products under HTS 2933.29.45.00
Clotrimazole API
Clotrimazole is an imidazole antifungal agent used in pharmaceutical formulations under HTS 2933.29.4500 for its unfused imidazole ring. It inhibits ergosterol synthesis in fungal cell membranes, treating conditions like athlete's foot and yeast infections.
Econazole Nitrate USP
Econazole nitrate, a broad-spectrum imidazole antifungal drug, falls under HTS 2933.29.4500 due to its characteristic unfused imidazole ring structure. Used primarily in dermatological treatments for fungal infections of skin and nails.
Miconazole Nitrate BP
Miconazole nitrate, an imidazole-class antifungal drug under HTS 2933.29.4500, features an unfused imidazole ring essential for its ergosterol biosynthesis inhibition. Widely used in oral, topical, and vaginal antifungal treatments.
Ketoconazole USP
Ketoconazole, a synthetic imidazole antifungal drug classified under HTS 2933.29.4500, contains an unfused imidazole ring critical to its mechanism. Used systemically for serious fungal infections and topically for dandruff/seborrheic dermatitis.
Tioconazole API
Tioconazole, a 1-substituted imidazole antifungal under HTS 2933.29.4500, targets vaginal candidiasis through ergosterol binding. Its unfused imidazole ring defines its Chapter 29 chemical classification as a pharmaceutical drug substance.
Omoconazole Pharmaceutical Reference Standard
Omoconazole, a development-stage imidazole antifungal drug substance under HTS 2933.29.4500, features the unfused imidazole ring characteristic of this tariff provision. Used in clinical trials and analytical reference standards.