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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, 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