2933.59.59.00/Propylthiouracil Crystals/Japan

Propylthiouracil Crystals from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• Thione tautomer confirmation via spectroscopy for classification

• Endocrine disruptor handling protocols required

• Crystalline vs amorphous form specs impact purity declaration