Standard Ammonium Sulfate 21% Nitrogen from China
Standard crystalline ammonium sulfate providing 21% nitrogen for general field crops like soybeans and rice. Falls squarely under HTS 3102.21.00.00 as described in chapter note 2(a)(iv) for pure ammonium sulfate. Widely used for its acidifying effect on alkaline soils.
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)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Batch testing for heavy metals required; exceedances may trigger hazardous material regulations
• Declare exact nitrogen content on commercial invoice to match 3102 nitrogenous fertilizer heading
• Avoid co-mingling with nitrate products in containers to prevent safety classification issues