Niridazole Crystals
Niridazole is a nitrothiazole-imidazole hybrid used as an antischistosomal agent, featuring the required unfused imidazole ring. As a chemically defined aromatic heterocyclic compound, it falls under HTS 2933.29.35.00 described in additional U.S. note 3.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If organo-sulfur function predominates over imidazole
Organo-sulfur compounds take precedence if sulfur-carbon linkage defines character.
If for veterinary use with specific sugar modifications
Veterinary compounds with carbohydrate moieties classified under 2934.
If diagnostic reagent preparation
Laboratory reagents are classified by use in Chapter 38, not pure compounds.
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Import Tips & Compliance
• Provide WHO prequalification documents if sourced from international manufacturers
• Include polymorphic form characterization to ensure batch consistency
• Declare exact CAS number (550-18-5) on commercial invoice for verification
Related Products under HTS 2933.29.35.00
Metronidazole USP
Metronidazole is a nitroimidazole derivative used as an antibiotic and antiprotozoal agent for treating infections like bacterial vaginosis and trichomoniasis. It features an unfused imidazole ring in its aromatic structure, classifying it under HTS 2933.29.35.00 as a nitrogen-heterocyclic compound described in additional U.S. note 3 to section VI.
Tinidazole Powder
Tinidazole is a synthetic antiprotozoal and antibacterial agent with a nitroimidazole ring structure, used for treating amebiasis and giardiasis. As an aromatic heterocyclic compound with nitrogen hetero-atoms only, it falls under HTS 2933.29.35.00 per additional U.S. note 3.
Dimetridazole Technical Grade
Dimetridazole is a 5-nitroimidazole compound used in veterinary medicine for treating histomoniasis in poultry. Its unfused imidazole ring structure qualifies it as an aromatic heterocyclic under HTS 2933.29.35.00 as specified in additional U.S. note 3.
Ornidazole API
Ornidazole is a nitroimidazole antimicrobial used for treating anaerobic bacterial infections and protozoal diseases. This aromatic compound with unfused imidazole ring is classified under HTS 2933.29.35.00 pursuant to additional U.S. note 3 to section VI.
Clofazimine Micronized Powder
Clofazimine is a riminophenazine with imidazole-like nitrogen heterocycle used for leprosy and mycobacterium avium treatment. Its aromatic structure qualifies under HTS 2933.29.35.00 per the specific U.S. note provisions.
Imidazole-4-Carboxylic Acid
Imidazole-4-carboxylic acid is a key intermediate for pharmaceutical synthesis, featuring the unfused imidazole ring required by heading 2933. As an aromatic heterocyclic compound listed in additional U.S. note 3, it imports under HTS 2933.29.35.00.