Theophylline USP Grade from China
Theophylline USP is a methylxanthine alkaloid used as a bronchodilator in respiratory medications. Classified under HTS 2939.59.00.00 as a theophylline derivative in pure form for pharmaceutical synthesis. Meets USP standards for medicinal applications.
Duty Rate — China → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Include DEA documentation if precursor concerns arise; provide pharmacopeia compliance certificates; avoid bulk packaging over 25kg to prevent industrial chemical reclassification