Phthalimide from Canada
Phthalimide is a cyclic imide derived from phthalic anhydride, used in organic synthesis and as a precursor for anthranilic acid. Falls under HTS 2924.29.95.00 as a cyclic amide/imide derivative. Common intermediate in dye and pharmaceutical production.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals Annex IV: patented pharma articles — 100% 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
• Potassium salt form stays classified with acid per note 3(C); provide synthesis route documentation; ensure no anhydride contamination affecting classification