Ammonium 7-Nitronaphth[1,2]oxadiazole-5-sulfonate from Canada
Ammonium salt providing volatility advantages in certain dye sublimation processes, covered by HTS 2934.99.06.00 salts provision. The ammonium counterion facilitates thermal decomposition applications in specialty colorants.
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
• Document ammonia content to prevent misclassification as free base
• Special ventilation requirements due to ammonia off-gassing potential
• Confirm pH stability as ammonium salts can hydrolyze in transit