Superphosphoric Acid Fertilizer Solution
Polyphosphoric acid solution used as liquid phosphorus source for fertigation systems. Classifies under HTS 3103.90.01.00 as a chemical phosphatic fertilizer derivative meeting superphosphate equivalency.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If industrial chemical grade
Phosphoric acid not labeled/intended as fertilizer remains in Chapter 28.
If ammonium nitrate solution mix
Liquid fertilizers combining AN with phosphoric acid fall under heading 3102.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Corrosive material declaration required; use UN-approved IBC totes with proper placarding
• pH and phosphorus speciation analysis essential to confirm fertilizer-grade classification
• Temperature-controlled shipping mandatory to prevent polymerization during transit
Related Products under HTS 3103.90.01.00
Triple Superphosphate Fertilizer
Triple superphosphate (TSP) is a highly concentrated phosphatic fertilizer containing 46% P2O5, produced by reacting phosphate rock with phosphoric acid. It falls under HTS 3103.90.01.00 as a superphosphate (triple) which is specifically listed under heading 3103 for mineral or chemical phosphatic fertilizers not put up in retail packaging.
Single Superphosphate Granules
Single superphosphate (SSP) contains 16-20% P2O5 and 11-12% sulphur, made by treating phosphate rock with sulfuric acid. Classified under HTS 3103.90.01.00 as a superphosphate explicitly covered by heading 3103 for phosphatic fertilizers in bulk form.
Diammonium Phosphate (DAP) Fertilizer
DAP is a chemical fertilizer with 18% nitrogen and 46% P2O5, used widely for basal application in crops. It qualifies under HTS 3103.90.01.00 as 'other' phosphatic fertilizers under heading 3103, specifically as calcium hydrogenorthophosphate derivatives meeting the fluorine threshold.
Monoammonium Phosphate (MAP) Bulk
MAP fertilizer provides 11% nitrogen and 52% P2O5 in granular form for starter fertilizers. It falls under HTS 3103.90.01.00 as an 'other' chemical phosphatic fertilizer meeting Chapter 31 note 3(a)(iv) criteria for phosphorus content.
Calcined Natural Phosphate Fertilizer
Heat-treated natural phosphates from heading 2510, calcined for impurity removal and reactivity enhancement. Explicitly covered by HTS 3103.90.01.00 under heading 3103 note 3(a)(ii) for processed phosphatic fertilizers.
Rock Phosphate Heat-Treated Fertilizer
Florida or Tennessee rock phosphate further heat-processed beyond impurity removal for agricultural use. HTS 3103.90.01.00 applies per note 3(a)(ii) for calcined natural phosphates converted to fertilizers.