Aluminum Potassium Sulfate (Potash Alum) from China
Aluminum potassium sulfate, or potash alum, is used in water purification, baking powder, and as an astringent. Technically a double salt, pure forms not meeting alum definitions classify under HTS 2833.29.51.
Duty Rate — China → United States
28.7%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Molecular weight analysis to confirm if double salt qualifies for 2833.30
• Food contact notifications required for baking powder applications
• Bulk vs retail packaging affects potential Chapter 21 reclassification