7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid from Canada
A specific aromatic heterocyclic compound featuring a nitronaphthoxadiazole core with a sulfonic acid group, classified under HTS 2934.99.06.00 as one of the enumerated 'other heterocyclic compounds'. This chemically defined organic compound is used primarily as an intermediate in dye synthesis and pharmaceutical production due to its reactive functional groups.
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
• Provide detailed chemical analysis certificates confirming the exact structure matches the HTS description to avoid reclassification
• Ensure proper hazardous material labeling as this compound may pose health risks during transport
• Verify purity levels (>98%) as impurities could trigger classification under general 'other' heterocyclic provisions