Granular Ammonium Sulfate Fertilizer 21-0-0 from China
Granular ammonium sulfate (21% nitrogen, 24% sulfur) is a widely used nitrogenous fertilizer for correcting sulfur deficiencies in crops like corn and wheat. It falls under HTS 3102.29.00.00 as a pure ammonium sulfate not packaged for retail sale under heading 3105. The product dissolves slowly in soil, providing sustained nutrient release.
Duty Rate — China → United States
25%
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
• Verify nitrogen content through lab analysis to confirm classification; ensure packaging does not qualify as retail under 3105; obtain phytosanitary certificates for agricultural imports