L-Triiodothyronine (Liothyronine)
Liothyronine is a synthetic amino acid derivative of the thyroid hormone T3, used primarily for hypothyroidism and myxedema coma treatment. Classified under HTS 2937.90.4500 as an 'other' amino-acid derivative hormone, it meets Chapter 29 requirements for separate chemically defined organic compounds.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as medicaments in measured doses
Bulk hormones become Chapter 30 products when formulated into dosage forms like capsules.
If emphasizing amino acid functional group over hormonal use
Chapter 29 prioritizes latest numerical heading, but non-hormonal amino acids go to 2922.
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Import Tips & Compliance
• Include pharmacopeia compliance certificates (USP/EP) to confirm identity as a pure hormone derivative
• Avoid anti-dusting agents that could render it suitable for specific non-general use per Chapter 29 note (g)
• Declare exact purity levels to prevent reclassification as mixtures outside Chapter 29 scope
Related Products under HTS 2937.90.45.00
L-Thyroxine Sodium
L-Thyroxine sodium is the synthetic sodium salt of thyroxine, a thyroid hormone amino acid derivative used primarily for treating hypothyroidism. It falls under HTS 2937.90.4500 as an amino-acid derivative used primarily as a hormone, fitting Chapter 29's scope for chemically defined organic compounds with hormonal function.
Calcitonin Salmon Recombinant
Recombinant salmon calcitonin is a synthetic polypeptide chain-modified derivative used primarily as a hormone for osteoporosis and hypercalcemia treatment. It qualifies for HTS 2937.90.4500 as an 'other' amino-acid derivative hormone, explicitly including chain-modified polypeptides per the heading.
Desmopressin Acetate
Desmopressin acetate is a synthetic vasopressin analogue, an amino-acid derivative polypeptide used primarily as an antidiuretic hormone for diabetes insipidus. It fits HTS 2937.90.4500 as a chain-modified structural analogue hormone under Chapter 29's organic compound provisions.
Oxytocin Synthetic
Synthetic oxytocin is a nonapeptide hormone amino-acid derivative used primarily for labor induction and postpartum hemorrhage control. Classified in HTS 2937.90.4500 as an 'other' chain-modified polypeptide hormone derivative fitting Chapter 29 criteria.
Sermorelin Acetate
Sermorelin acetate is a synthetic growth hormone-releasing hormone (GHRH) analogue, an amino-acid derivative polypeptide used primarily as a hormone stimulator. It falls under HTS 2937.90.4500 per heading 2937 definition including hormone-releasing factors as amino-acid derivatives.
Teriparatide Acetate
Teriparatide acetate is a recombinant parathyroid hormone fragment (amino-acid derivative polypeptide) used primarily as an anabolic hormone for osteoporosis. HTS 2937.90.4500 covers it as a chain-modified structural analogue hormone under Chapter 29.