Tungsten Phosphoric Acid Mixture for Catalysts from Canada
A chemical preparation combining phosphotungstic acid with other inorganic phosphates for industrial catalyst applications. Used in petroleum refining and chemical synthesis processes. Falls under 3824.99.3500 due to its inorganic tungsten compound mixture not specified elsewhere.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide catalyst end-use certificates to distinguish from general laboratory reagents
• Ensure precise chemical analysis certificate listing tungsten and other inorganics to support classification
• Comply with DOT hazardous material shipping rules for acidic preparations