Propylthiouracil Crystals from China
Propylthiouracil features pyrimidine-2-thione structure for thyroid treatment. Classifies HTS 2933.59.59.00 as pyrimidine drug; sulfur directly linked but nitrogen ring principal. Used in hyperthyroidism therapy.
Duty Rate — China → United States
3.7%
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
• Thione tautomer confirmation via spectroscopy for classification
• Endocrine disruptor handling protocols required
• Crystalline vs amorphous form specs impact purity declaration