Ammonium Thiosulfate Solution
Ammonium thiosulfate ((NH4)2S2O3) in aqueous solution is widely used as a fertilizer additive providing sulfur and nitrogen to crops and in leaching processes for gold extraction. It is classified under HTS 2832.30.5000 as an ammonium thiosulfate, fitting 'other' thiosulfates per Chapter 28 notes on salts.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported specifically as a fertilizer
Chapter 31 note 3 excludes certain Chapter 28 products when prepared as fertilizers.
If containing significant sulfite impurities
Phosphinates, phosphonates, etc., but mislabeled sulfites would go to 2832.10; thiosulfates remain in 2832.30.
If a formulated mixture for retail
Chemical preparations not chemically defined fall outside Chapter 28 per general rules.
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Import Tips & Compliance
• Provide concentration analysis to distinguish from other ammonium salts; use DOT-approved containers for liquid transport; check agricultural import permits if destined for fertilizer use
Related Products under HTS 2832.30.50.00
Sodium Thiosulfate Pentahydrate
Sodium thiosulfate pentahydrate (Na2S2O3·5H2O) is a colorless crystalline compound used in photography as a fixer to remove unexposed silver halides and in water treatment to neutralize chlorine. It falls under HTS 2832.30.5000 as it is a thiosulfate of an inorganic base, classified as 'other' thiosulfates not specified elsewhere in the subheading.
Potassium Thiosulfate Crystals
Potassium thiosulfate (K2S2O3) crystals serve as a reagent in analytical chemistry labs and in dechlorination processes for aquaculture. This chemically defined thiosulfate of potassium is covered by HTS 2832.30.5000 under 'other' thiosulfates.
Calcium Thiosulfate Powder
Calcium thiosulfate (CaS2O3) powder is utilized in the rubber industry as an accelerator and in wastewater treatment to precipitate heavy metals. Classified in HTS 2832.30.5000 as 'other' thiosulfates of inorganic bases.
Barium Thiosulfate Anhydrous
Barium thiosulfate (BaS2O3) anhydrous is a specialty chemical used in pyrotechnics for colored flame effects and as a reagent in qualitative analysis. It qualifies under HTS 2832.30.5000 for other thiosulfates.
Magnesium Thiosulfate Solution 30%
30% magnesium thiosulfate solution (MgS2O3) is applied in agriculture for soil amendment and in textile dyeing as an anti-chlor agent. HTS 2832.30.5000 covers this as other thiosulfates.
Zinc Thiosulfate Hydrate
Zinc thiosulfate hydrate (ZnS2O3·H2O) functions as a corrosion inhibitor in cooling water systems and in photographic developers. It is an 'other' thiosulfate under HTS 2832.30.5000.