Double Superphosphate Granules (DSP) from China
Double superphosphate (DSP) provides 40-46% P2O5 through a two-stage phosphoric acid process on phosphate rock, free of calcium sulfate unlike SSP. Classified under HTS 3103.19.00.00 as other superphosphates for high-analysis field application in row crops and vegetables. Its low sulfur content makes it ideal for sulfur-sensitive 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
• Document production process proving no sulfuric acid use to distinguish from SSP under 3103.10; request advance ruling for blends
• Ensure granules meet uniform size specs (2-4mm) to avoid reclassification as powder under different duties