Triple Superphosphate Fertilizer (TSP)
Triple superphosphate (TSP) is a highly concentrated phosphatic fertilizer containing 44-48% P2O5, produced by reacting phosphate rock with phosphoric acid. It falls under HTS 3103.19.00.00 as 'other superphosphates' distinct from single superphosphate, used primarily for crops needing high phosphorus like grains and fruits. This granular product dissolves readily in soil to promote root development.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If single superphosphate with gypsum byproduct
Single superphosphates (SSP) with 16-20% P2O5 from sulfuric acid reaction classified separately from concentrated 'other' superphosphates.
If put up in retail packages under 10kg
Fertilizers in consumer-ready tablets, packets or retail forms exceeding 10kg bulk threshold move to Chapter 31 heading 3105.
If mixed with significant nitrogen components like urea
Mixtures qualifying under heading 3102 nitrogenous fertilizers take precedence over pure phosphatic classification.
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Import Tips & Compliance
• Verify P2O5 content via lab analysis to confirm classification under superphosphates, avoiding misclassification as basic slag
• Include certificate of analysis showing fluorine content under 0.2% if claiming specific duty rates; ensure bulk packaging complies with heading 3103 exclusions
• Check for pesticide residues as phosphatic fertilizers may trigger EPA import alerts; common pitfall is inadequate soil nutrient labeling
Related Products under HTS 3103.19.00.00
Granular Triple Superphosphate 46% P2O5
This premium granular TSP delivers 46% available phosphoric acid (P2O5) in 2-4mm prills for uniform soil distribution via broadcast or side-dress. HTS 3103.19.00.00 covers this as other superphosphate for intensive farming of corn, soybeans and cotton. Water-soluble phosphorus boosts early root growth without nitrogen.
Water-Soluble Triple Superphosphate Powder
Fine-ground TSP powder (95% through 100 mesh) with 44% P2O5 for fertigation systems and foliar applications in greenhouses. Falls under HTS 3103.19.00.00 as other superphosphates, ideal for hydroponics and drip irrigation of tomatoes and peppers. Rapid dissolution prevents clogging emitters.
High-Grade Double Superphosphate 42%
DSP 42% P2O5 in dense granules resists crushing during pneumatic application, suitable for aviation-spread over large pastures. HTS 3103.19.00.00 'other superphosphates' for phosphorus-deficient grasslands and hayfields. Minimal free phosphoric acid reduces equipment corrosion.
Enriched Triple Superphosphate with Micronutrients
TSP fortified with 0.5% zinc and boron meets Chapter 31 note limits for inorganic nonfertilizing additives, retaining superphosphate status. HTS 3103.19.00.00 for corrected deficiency in calcareous soils growing wheat and rice. Granules ensure uniform micronutrient delivery.
Double Superphosphate Granules (DSP)
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.