Imidazole (C3H4N2)
Imidazole is a five-membered heterocyclic aromatic compound with two nitrogen atoms, classified under HTS 2933.29.60.00 as a compound containing an unfused imidazole ring. It serves as a fundamental building block in organic synthesis for pharmaceuticals and agrochemicals.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If substituted with alkyl or aryl groups
Substituted imidazoles fall under 'other' within the same imidazole heading, not pure imidazole.
If part of a fused ring system like purine
Fused imidazole derivatives like those in nucleobases classify under other azine provisions later in numerical order.
If imported as a formulated mixture or solution for specific use
Mixtures not qualifying as simple solutions under chapter note (e) fall into Chapter 38 as chemical preparations.
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The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify purity certificates (≥99%) as impurities may affect classification; ensure SDS includes chemical identity for HAZMAT compliance; declare as pure compound, not mixtures exceeding chapter note limits
Related Products under HTS 2933.29.60.00
1H-Imidazole Pharmaceutical Grade
High-purity 1H-Imidazole used in synthesis of antifungal drugs like clotrimazole, classified under HTS 2933.29.60.00 for unfused imidazole rings. Meets USP standards for medicinal intermediate production.
Imidazole Buffer Reagent ACS Grade
ACS-certified Imidazole used as a buffering agent in biochemical assays and protein purification, under HTS 2933.29.60.00 for its unfused imidazole structure. Essential in lab pH control between 6.0-7.0.
Glyoxal Bis-Imidazole Precursor
Pure Imidazole serving as precursor for glyoxal bis(2-hydroxyanil), a photographic chemical, classified in HTS 2933.29.60.00 as unfused imidazole. Used in dye synthesis for imaging applications.
4-Nitroimidazole Intermediate
Imidazole with nitro group at position 4, but primarily classified as imidazole under HTS 2933.29.60.00 per chapter notes on derivatives. Key for metronidazole antibiotic synthesis.
Imidazole Corrosion Inhibitor Base
Technical-grade Imidazole used as base for copper corrosion inhibitors in industrial coolants, under HTS 2933.29.60.00 for unfused ring structure. Forms complexes with metal surfaces.
2-Methylimidazole Catalyst
2-Methylimidazole, a alkyl-substituted imidazole used as epoxy resin curing catalyst, classified under HTS 2933.29.60.00 as 'other' imidazole. Promotes cross-linking in polymer production.