Tungsten Phosphoric Acid Mixture for Catalysts from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
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