Phthalide from Canada
Phthalide is a bicyclic lactone with a five-membered oxygen-containing heterocyclic ring fused to benzene, classified under 2932.20.50.50. Used as an intermediate in dye and pharmaceutical synthesis.
Duty Rate — Canada → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Submit NMR/IR spectra confirming lactone structure to distinguish from phthalide derivatives
• Verify no sulfonation/halogenation per Chapter 29 exclusion notes to maintain classification
• Include end-use statement if for R&D to qualify for duty-free treatment under certain HTSUS provisions