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2922.49.49.50/L-Histidine/Canada

L-Histidine from Canada

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 — Canada → United States

14.2%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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Import Tips

• Imidazole ring purity testing prevents heterocyclic misclassification

• USP/NF monograph compliance for pharmaceutical intermediates

• Moisture content <0.5% specification stability

L-Histidine from Canada — Import Duty Rate | HTS 2922.49.49.50