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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If coating makes it a mineral/chemical mixture for retail
Complex retail formulations with coatings often classified as mixtures in 3105.51.
If for ureated or treated forms beyond simple coating
Urea-ammonium sulfate doubles or specially treated forms go to 3102.60.
If chemical treatment dominates fertilizer function
Heavily processed chemical preparations may fall under Chapter 38.
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Import Tips & Compliance
• Document coating composition to prove it's still primarily ammonium sulfate; avoid 'slow-release' retail labeling; comply with EPA fertilizer coating regulations
Related Products under HTS 3102.29.00.00
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.
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.
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.