2,4-Thiazolidinedione from Japan
2,4-Thiazolidinedione serves as the core structure for glitazone antidiabetic drugs like pioglitazone, featuring a saturated thiazolidine ring (hydrogenated thiazole). Classifies under HTS 2934.10.90.00 as 'other' thiazole ring compounds including hydrogenated forms per heading description.
Duty Rate — Japan → United States
21%
Rate breakdown
9903.04.628.5%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
9903.05.4912.5%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
• Verify tautomer stability with HPLC; declare keto-enol equilibrium state
• Include downstream synthesis pathway documentation for legitimate pharmaceutical use
• Monitor DEA precursor chemical status for controlled substance analogs