Granular Ammonium Sulfate Fertilizer 21-0-0
Granular ammonium sulfate (21% nitrogen, 24% sulfur) is a widely used nitrogenous fertilizer for correcting sulfur deficiencies in crops like corn and wheat. It falls under HTS 3102.29.00.00 as a pure ammonium sulfate not packaged for retail sale under heading 3105. The product dissolves slowly in soil, providing sustained nutrient release.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If put up in retail packages under 10kg
Fertilizers in consumer-ready retail packaging shift to heading 3105 regardless of composition.
If it's a double salt or mixture with ammonium nitrate
Mixtures of ammonium sulfate and ammonium nitrate are specifically classified under 3102.21.
If animal or vegetable origin rather than synthetic
Organic fertilizers from natural sources fall under Chapter 31 heading 3101.
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Import Tips & Compliance
• Verify nitrogen content through lab analysis to confirm classification; ensure packaging does not qualify as retail under 3105; obtain phytosanitary certificates for agricultural imports
Related Products under HTS 3102.29.00.00
Industrial Grade Ammonium Sulfate Crystals
Pure crystalline ammonium sulfate used in industrial agriculture for alkaline soil correction and as a nitrogen source in large-scale farming. Classified under HTS 3102.29.00.00 as 'other' ammonium sulfate not in retail form. Commonly applied via broadcast spreaders for crops like potatoes and soybeans.
Water-Soluble Ammonium Sulfate 21% Nitrogen
Fast-dissolving ammonium sulfate powder for fertigation systems and foliar applications in greenhouse vegetable production. HTS 3102.29.00.00 covers this pure form not in retail packaging. Provides immediate nitrogen and sulfur availability to plants.
AgroChem Ammonium Sulfate Bulk Fertilizer
Bulk ammonium sulfate fertilizer (N-P-K 21-0-0) for commercial farming operations, shipped in 50kg bags or supersacks. Falls under HTS 3102.29.00.00 as other ammonium sulfate excluding double salts with nitrate. Ideal for sulfur-deficient soils in cotton production.
SulfurCoated Ammonium Sulfate Fertilizer
Polymer-sulfur coated ammonium sulfate granules for controlled-release nitrogen in turf and golf course applications. Classified under HTS 3102.29.00.00 as it remains fundamentally ammonium sulfate. Coating extends nutrient availability up to 120 days.
Neutral pH Ammonium Sulfate for Blueberries
Specially formulated ammonium sulfate with pH neutralizers for acid-loving crops like blueberries and azaleas. HTS 3102.29.00.00 applies as base material remains pure ammonium sulfate. Lowers soil pH while supplying sulfur nutrition.
Caprolactam Byproduct Ammonium Sulfate
High-purity ammonium sulfate recovered from nylon production as caprolactam byproduct, repurposed for fertilizer use. Falls under HTS 3102.29.00.00 when sold as agricultural fertilizer. Contains trace organic residuals but meets fertilizer specs.