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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If nitro group dominates over heterocyclic classification
Nitro derivatives of heterocycles sometimes classify by nitro function in heading 2904.
If ring hydrogenated or additional heteroatoms present
Hydrogenated or more complex nitrogen heterocycles classify later in 2933.
If technical grade with >20% impurities
Impurities exceeding chapter note limits shift to chemical preparations.
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Import Tips & Compliance
• Declare nitro content and provide explosive classification test results (UN 1224 if applicable)
• Use UN-approved packaging for nitro compounds to comply with DOT hazardous materials regulations
• Verify no sulfonation present which would shift classification to different subheading
Related Products under HTS 2933.29.90.00
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.
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.
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.