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2939.59.00.00/Theophylline Guaiacol Ester/Germany

Theophylline Guaiacol Ester from Germany

Theophylline guaiacol ester modifies alkaloid pharmacokinetics for sustained release. Classifies HTS 2939.59.00.00 per ester rules following parent xanthine. Used in experimental pulmonology.

Duty Rate — Germany → United States

0%

Rate breakdown

9903.05.860%Universal product exemption (U.S. note 52(b))
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Import Tips

• Ester linkage confirmation; guaiacol impurity limits; research-only labeling