Isosafrole USP Grade from Japan
Pharmaceutical-grade isosafrole meeting USP standards for purity, used as an intermediate in synthesizing piperonal derivatives and other API precursors. Classified under HTS 2932.91.00.00 due to its specific chemical identity as a heterocyclic oxygen compound despite pharmaceutical end-use intent. Supplied in amber glass bottles with stabilizers only for transport safety.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include USP Certificate of Analysis showing >99% purity to avoid reclassification as a mixture
• Declare intended pharmaceutical intermediate use but note Chapter 29 takes precedence over Chapter 30 exclusions
• Ensure stabilizers qualify under Chapter Note (f) as necessary for preservation/transport only