2939.59.00.00/Proxyphylline Pure Substance/Japan

Proxyphylline Pure Substance from Japan

Proxyphylline (7-(2-hydroxypropyl)theophylline) is a soluble theophylline derivative for expectorant medications. HTS 2939.59.00.00 classification for bulk pharmaceutical chemical. Used in cough syrup active ingredient.

Duty Rate — Japan → United States

15%

Rate breakdown

9903.04.6215%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter

9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter

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Import Tips

• Confirm hydroxypropyl isomer purity; GMP audit trail required; avoid shipping in excipient blends