Ammonium Aluminum Sulfate Tanning Salt from Mexico
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 — Mexico → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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