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2933.59.70.00/Proxyphylline Pharmaceutical Grade/China

Proxyphylline Pharmaceutical Grade from China

Proxyphylline, a hydroxyethyltheophylline with pyrimidine rings, serves as a mild bronchodilator. Covered under HTS 2933.59.70.00 for its aromatic pyrimidine structure in additional U.S. note 3. Supplied for API manufacturing.

Duty Rate — China → United States

112.5%

Rate breakdown

9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
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Import Tips

• Declare as 'bulk drug substance' not finished product

• Include synthetic route summary confirming heterocyclic identity

• Monitor EU REACH compliance for transatlantic shipments

Proxyphylline Pharmaceutical Grade from China — Import Duty Rate | HTS 2933.59.70.00