Ammonium Polyphosphate
Ammonium polyphosphate is used as a flame retardant in plastics, textiles, and intumescent coatings due to its phosphorus content. Classified under HTS 2835.39.5000 as it represents polyphosphates of ammonium per Chapter 28 notes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If simple ammonium phosphate without polymerization
Chapter notes specify that only polymeric forms stay in polyphosphate subheading.
If when finishing agents for textiles
Polyphosphates applied as flame-retardant finishing preparations fall under Chapter 38.
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Import Tips & Compliance
• Include REACH/TSCA registrations and flame retardant efficacy test results
• Declare phosphorus content accurately to avoid scrutiny under environmental regulations
Related Products under HTS 2835.39.50.00
Sodium Tripolyphosphate (STPP)
Sodium tripolyphosphate is a polyphosphate salt used primarily as a builder in detergents and cleaning products to soften water and enhance cleaning efficiency. It falls under HTS 2835.39.5000 as it is a polyphosphate compound, chemically defined, not specifically enumerated elsewhere in the heading.
Potassium Tripolyphosphate
Potassium tripolyphosphate serves as a food additive for moisture retention in seafood processing and as a sequestrant in industrial applications. Classified in HTS 2835.39.5000 as an 'other' polyphosphate, it meets Chapter 28 criteria for inorganic polyphosphate salts.
Sodium Hexametaphosphate (SHMP)
Sodium hexametaphosphate, a cyclic polyphosphate, functions as a water softener, dispersant in ceramics, and sequestrant in food processing. It qualifies for HTS 2835.39.5000 as an 'other' polyphosphate meeting chemical definition criteria.
Calcium Polyphosphate
Calcium polyphosphate serves as a dietary supplement for bone health and in dental applications for remineralization. It is an 'other' polyphosphate under HTS 2835.39.5000, chemically defined per Chapter 28.
Potassium Polyphosphate
Potassium polyphosphate finds use in meat processing for water binding and in fire retardant formulations. It is imported under HTS 2835.39.5000 as other polyphosphates.
Tetrasodium Pyrophosphate
Tetrasodium pyrophosphate is a polyphosphate used in toothpaste as a tartar control agent and in water treatment for corrosion inhibition. It is categorized under HTS 2835.39.5000 for polyphosphates other than sodium tripolyphosphate.