Xanthen-9-one from Japan
Xanthen-9-one, also known as xanthone, is an aromatic heterocyclic compound featuring a central pyrone ring fused with benzene rings, containing oxygen hetero-atoms only. It is used in dye synthesis, pharmaceuticals, and as a fluorescent probe, classified under HTS 2932.99.39.00 as a specifically enumerated product. This pure organic compound meets Chapter 29 requirements for separate chemically defined heterocycles.
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
• Submit NMR or mass spectrometry data to confirm aromatic heterocyclic structure and exclude impurities outside Chapter 29 allowances
• Declare any added stabilizers separately; anti-dusting agents are permitted only if not rendering specific use per note (g)