L-Histidine from Japan
L-Histidine is an essential amino acid featuring imidazole ring, classified as oxygen-function amino-acid under HTS 2922.49.4950. Used in allergy medications, metal chelation, and buffering agents.
Duty Rate — Japan → United States
4.2%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Imidazole ring purity testing prevents heterocyclic misclassification
• USP/NF monograph compliance for pharmaceutical intermediates
• Moisture content <0.5% specification stability