Isoquinoline 95% with Stabilizer from Canada
Isoquinoline at 95% purity with added stabilizer for transport, allowed under Chapter 29 note (f), remains HTS 2933.49.15.00. Used in agrochemical formulation.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6094.2%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
• List stabilizer composition to confirm it doesn't change product use
• Validate stabilizer is solely for preservation per chapter notes