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Imidazole from Japan

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.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

Import Tips

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