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
15%
Rate breakdown
9903.04.628.5%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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