L-Thyroxine Sodium from Japan
L-Thyroxine sodium is the synthetic sodium salt of thyroxine, a thyroid hormone amino acid derivative used primarily for treating hypothyroidism. This chemically defined compound is reproduced by synthesis and exerts hormonal effects on metabolism. It is classified under 2937.90.00 as an amino-acid derivative hormone used primarily for hormonal therapy.
Duty Rate — Japan → Canada
0%
Import Tips
• Provide a Certificate of Analysis confirming the L-isomer and sodium salt form
• Ensure the product is not mixed with excipients or put up in dosage units
• Confirm the end-use is hormonal therapy to support classification under 2937.90.00