Ammonium Aluminum Sulfate Tanning Salt from Japan
Ammonium aluminum sulfate (alum) acts as an inorganic tanning agent for producing vegetable-retanned or combination leathers with firm texture. Classified under HTS 3202.90.10.00 for its purely inorganic composition and tanning application. Traditional use in glove and bookbinding leathers.
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 comparative analysis vs. potassium alum to confirm tanning-grade specifications
• Ensure ammonia content declarations for proper hazmat classification
• Document batch tanning trials supporting classification over general alums