Double Superphosphate Granules (DSP) from Canada
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 — Canada → United States
0%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 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