Peroxoborates (perborates)
Silicates; commercial alkali metal silicates. > Of sodium: > Sodium metasilicates > Peroxoborates (perborates)
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Subheadings
Products classified under Tariff item 2840.30.00
Ammonium Perborate
Ammonium perborate is a peroxysalt of ammonium that releases active oxygen in mild bleaching and cleaning applications, such as denture cleansers. As a chemically defined ammonium salt of an inorganic peroxyacid, it falls squarely within the scope of heading 28.40, which covers peroxoborates (perborates).
Anhydrous Sodium Perborate
Anhydrous sodium perborate (NaBO3) is used in high-performance bleaching formulations where water content must be minimized. As a chemically defined peroxoborate, it falls under heading 28.40, regardless of hydration state.
Calcium Peroxoborate
Calcium peroxoborate is an alkaline earth peroxoborate used in dental bleaching products and specialty oxidants. As a chemically defined peroxoborate, it is classified under heading 28.40, which covers peroxoborates (perborates).
Disodium Perborate
Disodium perborate is a crystalline peroxoborate salt that liberates oxygen in laundry boosters and stain removers. As a chemically defined sodium peroxoborate, it is classified under heading 28.40, which specifically includes peroxoborates (perborates).
Industrial Sodium Perborate Flakes
Industrial sodium perborate flakes are a physical form of sodium perborate monohydrate used in bulk paper pulp bleaching. The flake form does not alter the chemical classification, and the product remains a peroxoborate under heading 28.40.
Perborate Bleach Powder (Technical Grade)
Technical grade perborate bleach powder, typically over 98% sodium perborate, is imported for detergent manufacturing. As a chemically defined peroxoborate, it is classified under heading 28.40, which covers peroxoborates (perborates).
Perborate Oxygen Source for Denture Tablets
Pharmaceutical-grade sodium perborate is the active oxygen component in effervescent denture cleaning tablets. When imported as the pure chemical compound, not as the finished tablet, it is classified under heading 28.40 as a peroxoborate.
Peroxoboric Acid
Peroxoboric acid, in stabilized form, is a precursor for perborate salts in laboratory and fine chemical production. As a chemically defined peroxoborate, it is classified under heading 28.40, which includes peroxoborates (perborates).
Potassium Perborate
Potassium perborate is an alkali metal peroxoborate used in specialized bleaching and disinfection formulations. As a chemically defined peroxoborate salt, it is classified under heading 28.40, which covers peroxoborates (perborates).
Potassium Peroxoborate
Potassium peroxoborate is an alkali metal perborate used in specialized bleaching applications and as an oxygen source in chemical synthesis. As a chemically defined peroxoborate, it is classified under heading 28.40.
Sodium Perborate Anhydrous
Anhydrous sodium perborate is the dehydrated form of the peroxoborate salt, used in high-temperature bleaching and chemical synthesis. Regardless of hydration state, chemically defined peroxoborates are classified under heading 28.40.
Sodium Perborate for Textile Bleaching
High-purity sodium perborate for textile bleaching releases peroxide under alkaline conditions. As a chemically defined peroxoborate, it is classified under heading 28.40, which covers peroxoborates (perborates).
Sodium Perborate Monohydrate
Sodium perborate monohydrate is a peroxoborate salt used in oxygen bleach powders and cleaning agents for its controlled release of hydrogen peroxide. As a chemically defined peroxoborate, it is classified under heading 28.40.
Sodium Perborate Tetrahydrate
Sodium perborate tetrahydrate is a white crystalline powder used as an oxidizing agent in laundry detergents and bleaching applications. As a peroxoborate, it is classified under heading 28.40, which specifically includes peroxoborates (perborates).
Technical Grade Sodium Perborate
Technical grade sodium perborate is a high-purity powder (95-99%) for industrial bleaching in paper and textile processing. As a chemically defined sodium peroxoborate, it is classified under heading 28.40.