Imidazole
Imidazole is a five-membered heterocyclic ring containing two nitrogen atoms, fundamental to histidine and many pharmaceuticals. HTS 2934.99.90.01 includes it as other heterocyclic compounds.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If specifically provided as azole under pyridine/quinline provisions
Imidazoles sometimes grouped with pyridine derivatives in 2933.29.
If classified primarily as aromatic amine
Nitrogen function (amine) takes precedence over heterocyclic structure.
If peptide-bound in enzyme mimicry applications
Peptones and protein derivatives shift to Chapter 35 classification.
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Import Tips & Compliance
• Provide histidine equivalence data if used in nutritional supplements
• Use low-temperature shipping to prevent sublimation losses
• Verify no histidine contamination which changes biochemical classification
Related Products under HTS 2934.99.90.01
Quinazoline
Quinazoline is a bicyclic heterocyclic compound featuring a fused benzene and pyrimidine ring, classified under HTS 2934.99.90.01 as 'other' heterocyclic compounds. It serves as a key intermediate in pharmaceutical synthesis for drugs targeting cancer and neurological disorders.
Pteridine
Pteridine is a fused pyrimido-pyrimidine heterocyclic system used in biochemical research and as a precursor for folate derivatives. It falls under HTS 2934.99.90.01 as other heterocyclic compounds not specifically named elsewhere in heading 2934.
Purine
Purine is the parent bicyclic heterocyclic compound (imidazole fused with pyrimidine) forming the core of adenine and guanine. Classified in HTS 2934.99.90.01 as other heterocyclic compounds, serving as a nucleic acid base precursor.
Isoquinoline
Isoquinoline is a heterocyclic aromatic organic compound with a benzene ring fused to a pyridine ring. It is imported under HTS 2934.99.90.01 as other heterocyclic compounds and used in alkaloid synthesis and as a corrosion inhibitor.
1,8-Naphthyridine
1,8-Naphthyridine is a rigid bicyclic heterocyclic compound with nitrogen atoms at positions 1 and 8, used in metal coordination chemistry. Falls under HTS 2934.99.90.01 as other heterocyclic nitrogen compounds not elsewhere specified.
Oxazole
Oxazole is a five-membered heterocyclic aromatic ring containing oxygen and nitrogen atoms. Classified under HTS 2934.99.90.01 as other heterocyclic compounds, it is used in pharmaceutical intermediates and agrochemicals.