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
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Thione tautomer confirmation via spectroscopy for classification
• Endocrine disruptor handling protocols required
• Crystalline vs amorphous form specs impact purity declaration