Triple Superphosphate 46% P2O5 Fertilizer from China
Triple superphosphate (TSP) is a high-phosphorus fertilizer containing 46% P2O5 by weight, produced by reacting phosphate rock with phosphoric acid. It falls under HTS 3103.11.00.00 as a superphosphate with 35% or more diphosphorus pentaoxide, specifically the triple grade variant. Used primarily for root development in crops like corn and soybeans.
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
• Verify P2O5 content through lab analysis to confirm classification under 3103.11.00.00 (≥35%) vs lower grades in 3103.10
• Obtain fertilizer registration certificates from USDA/APHIS and ensure proper labeling of nutrient content per EPA FIFRA regulations
• Avoid common pitfalls like misdeclaring as blended fertilizer, which could shift to 3105 if packaged for retail