Bulk Ammonium Sulfate for Cotton Crops
Bulk ammonium sulfate specifically formulated for cotton farming to supply nitrogen and sulfur during vegetative growth stages. It meets HTS 3102.21.00.00 criteria as ammonium sulfate without retail packaging or prohibited mixtures. Helps lower soil pH while providing essential nutrients.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mixed with magnesium nitrate
Double salts of calcium/magnesium nitrate with ammonium sulfate go to 3102.40.
If in aqueous ammoniacal solution
Liquid ammonium nitrate or urea solutions shift to specific 3105 categories.
If animal/vegetable origin
Organic-based fertilizers like guano are under 3101, excluding mineral chemical types.
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
• Document end-use as agricultural fertilizer to distinguish from industrial chemical imports
• Test for fluorine content if blended, though pure forms avoid 3103 superphosphate confusion
• Use ventilated containers to prevent caking during ocean transport, common in sulfate fertilizers
Related Products under HTS 3102.21.00.00
Granular Ammonium Sulfate 21-0-0 Fertilizer
Granular ammonium sulfate fertilizer with 21% nitrogen and 24% sulfur content, used primarily for correcting sulfur deficiencies in crops like corn and wheat. It falls under HTS 3102.21.00.00 as pure ammonium sulfate not put up in retail packages of heading 3105. The prilled form allows for even spreading and slow-release nitrogen supply to plants.
Prilled Ammonium Sulfate Industrial Grade
Prilled ammonium sulfate used in industrial agriculture for alkaline soil correction and as a nitrogen source in turf management. Classified under HTS 3102.21.00.00 as it qualifies as pure ammonium sulfate per heading 3102 notes (a)(iv). Its small prill size ensures uniform application in large-scale farming.
Standard Ammonium Sulfate 21% Nitrogen
Standard crystalline ammonium sulfate providing 21% nitrogen for general field crops like soybeans and rice. Falls squarely under HTS 3102.21.00.00 as described in chapter note 2(a)(iv) for pure ammonium sulfate. Widely used for its acidifying effect on alkaline soils.
Water-Soluble Ammonium Sulfate Fertilizer
Highly water-soluble ammonium sulfate for fertigation systems in greenhouse vegetable production. Classified under HTS 3102.21.00.00 meeting purity standards for ammonium sulfate without additives. Enables precise nutrient delivery through drip irrigation.
Agricultural Grade Ammonium Sulfate Pellets
Pelletized agricultural grade ammonium sulfate for easy handling in mechanical spreaders on golf courses and lawns. HTS 3102.21.00.00 applies as pure ammonium sulfate per note 2(a)(iv), not retail packaged. Provides dual nitrogen and sulfur nutrition.