L-Threonine USP Grade from Japan
L-Threonine USP is a high-purity enantiomer of the essential amino acid used in pharmaceuticals, supplements, and livestock nutrition. Classified under HTS 2922.49.49 as an other oxygen-function amino acid in pure form. Meets USP standards for human and animal consumption.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include USP certificate and chiral purity documentation (HPLC results) to confirm L-form classification
• For human supplement use, ensure FDA GRAS status and proper labeling; separate pharma shipments from feed grade