Chapter 2840 — Customs Tariff Headings

Anhydrous Disodium Tetraborate Powder

Anhydrous disodium tetraborate (Na2B4O7), also known as refined borax in its dehydrated form, is a chemically defined inorganic compound. It is used in industrial glass manufacturing and as a flux, and its anhydrous nature makes it classifiable under this tariff item.

Anhydrous Refrax Borax

Anhydrous disodium tetraborate sold under the brand 'Refrax' is a pure inorganic borate compound used in fiberglass production. Its anhydrous form is specifically covered by this tariff item, as it is refined borax without water molecules.

High-Purity Anhydrous Sodium Tetraborate

High-purity anhydrous sodium tetraborate is a chemically defined compound used in laboratory reagents and pharmaceutical intermediates. It falls under this tariff item as refined anhydrous disodium tetraborate, meeting Chapter 28's requirements for separate chemically defined compounds.

Industrial Grade Anhydrous Borax

Industrial-grade anhydrous borax is refined disodium tetraborate without water, used in enamel frits and soldering fluxes. It is a chemically defined inorganic compound classifiable under this tariff item as anhydrous refined borax.

Pharma-Grade Anhydrous Tetraborate

Pharmaceutical-grade anhydrous disodium tetraborate is a high-purity chemically defined compound used in buffer solutions for drug manufacturing. It is classifiable under this tariff item as refined anhydrous borax, meeting Chapter 28's criteria for separate compounds.

Refined Anhydrous Borax Granules

Granular anhydrous disodium tetraborate is refined borax in anhydrous form, used in ceramic glazes and metallurgical fluxes. It is a chemically defined inorganic compound falling under this tariff item as anhydrous refined borax.

Technical Anhydrous Borax 99.5%

Technical-grade 99.5% anhydrous disodium tetraborate is used in welding fluxes and high-temperature applications. It is a chemically defined compound classifiable under this tariff item as anhydrous refined borax, distinguished by its lack of water molecules.

High-Purity Refined Borax for Metallurgy

High-purity refined disodium tetraborate (borax) in powder form, used as a flux in non-ferrous metal soldering and brazing. It is a separate chemically defined compound of Chapter 28, not excluded by the chapter notes, and is not a cermet or sintered carbide.

Pharmaceutical Grade Refined Borax

Pharmaceutical-grade refined borax (disodium tetraborate) meeting USP standards, used in buffers and eye washes. It is a chemically defined compound of Chapter 28, not excluded by the chapter notes, and is not put up in measured doses or for retail sale.

Refined Anhydrous Borax (Na2B4O7)

Refined anhydrous borax (Na2B4O7), a white powder used in glass manufacturing and cleaning agents. It is a separate chemically defined compound of Chapter 28, not excluded by the chapter notes, and is not a product of Section V or other excluded goods.

Refined Borax Decahydrate USP Grade

Refined borax decahydrate (Na2B4O7·10H2O) of USP grade with specific impurity controls, used in pharmaceutical and laboratory applications. It is a chemically defined compound of Chapter 28, not excluded by the chapter notes, and is not put up for retail sale.

Refined Borax for Laundry Detergents

Bulk refined borax powder (Na2B4O7) used as a builder in laundry detergent formulations. It is a chemically defined inorganic compound of Chapter 28, not excluded by the chapter notes, and is not put up for retail sale as a preparation.

Refined Borax Granules for Glass Production

Granular refined disodium tetraborate optimized for fiberglass and glass flux applications. It is a separate chemically defined compound of Chapter 28, not excluded by the chapter notes, and is not a luminophore or glass frit.

Refined Borax Pentahydrate

Refined borax pentahydrate (Na2B4O7·5H2O), a crystalline form of disodium tetraborate used in detergents and herbicides. It is a separate chemically defined compound of Chapter 28, not excluded by the chapter notes, and is not a product of Chapter 31.

Technical Grade Refined Borax Powder

Technical grade refined borax powder, a high-purity disodium tetraborate for industrial flux in metallurgy and welding. It is a chemically defined compound of Chapter 28, not excluded by the chapter notes, and is not an organo-inorganic compound.

Ammonium Pentaborate Solution

Ammonium pentaborate solution (20-40% concentration) is a chemically defined inorganic compound used as a fire retardant and boron supplement in agriculture. It qualifies as an 'other borate' under tariff item 2840.20.00, as it is not a sodium borate or peroxoborate.

Barium Borate

Barium borate is a chemically defined inorganic compound used in optical glass and X-ray screens for its refractive index control. It falls under tariff item 2840.20.00 as an 'other borate', not being a sodium borate or peroxoborate.

Cadmium Borate

Cadmium borate is a metal borate used in phosphors and specialty pigments, classified under tariff item 2840.20.00 as an 'other borate'. It is a chemically defined inorganic compound, but its cadmium content subjects it to strict regulatory controls.

Calcium Borate Precipitate

Calcium borate precipitate is a fine particulate form of calcium borate used in specialty ceramics and as a boron supplement. It is classified under tariff item 2840.20.00 as an 'other borate', being a chemically defined inorganic calcium salt.

Disodium Tetraborate Anhydrous

Disodium tetraborate anhydrous is a dehydrated form of borax used in industrial applications like enamel frits and herbicides. It is classified under tariff item 2840.20.00 as an 'other borate', being a pure inorganic sodium borate that is not a peroxoborate.

Lead Borate

Lead borate is a metal borate used in glass-to-metal seals and radiation shielding glass due to its high density and fusion properties. It is classified under tariff item 2840.20.00 as an 'other borate', being a chemically defined inorganic lead compound.

Magnesium Borate Hydrate

Magnesium borate hydrate is a chemically defined inorganic magnesium salt used as a lubricant additive and anti-corrosion agent. It is classified under tariff item 2840.20.00 as an 'other borate', not being a sodium borate or peroxoborate.

Potassium Tetraborate

Potassium tetraborate is an inorganic salt used as a boron source in welding fluxes and ceramics. It is classified under tariff item 2840.20.00 as an 'other borate', distinct from sodium borates, and appears as a white powder.

Sodium Peroxoborate (Incorrectly Shipped)

Sodium peroxoborate is sometimes misdeclared but belongs under sodium borates or peroxoborates, not 'other borates'. Tariff item 2840.20.00 applies only to non-peroxy borates per subheading notes, so this candidate is excluded.

Sodium Tetraborate Decahydrate (Borax)

Sodium tetraborate decahydrate, commonly known as borax, is a hydrated sodium borate salt used in detergents, glass manufacturing, and as a flux. It is classified under tariff item 2840.20.00 as an 'other borate', being a chemically defined sodium borate that is not a peroxoborate.

Zinc Borate Powder (2ZnO·3B2O3·3.5H2O)

Zinc borate powder (2ZnO·3B2O3·3.5H2O) is a flame retardant and smoke suppressant used in plastics and textiles. It is classified under tariff item 2840.20.00 as an 'other borate', being a metal borate salt per heading applicability.

Ammonium Perborate

Ammonium perborate is a peroxysalt of ammonium that releases active oxygen in applications such as denture cleaners and mild bleaching agents. It is a separate chemically defined compound of an inorganic base, which falls under heading 28.40 as a peroxoborate (perborate).

Anhydrous Sodium Perborate

Anhydrous sodium perborate (NaBO3) is the dehydrated form used in high-performance bleaching formulations where water content must be minimized. It is a chemically defined peroxoborate, classifiable under heading 28.40.

Calcium Peroxoborate

Calcium peroxoborate is an alkaline earth peroxoborate utilized in dental bleaching products and specialty oxidants. It is a chemically defined compound of an inorganic base, classifiable under heading 28.40.

Disodium Perborate

Disodium perborate is a crystalline peroxoborate salt of sodium, used as an oxygen liberator in laundry boosters. It is a separate chemically defined compound of an inorganic base, classifiable under heading 28.40 as a peroxoborate (perborate).

Industrial Sodium Perborate Flakes

Industrial sodium perborate flakes, specifically the monohydrate form, are used in bulk applications such as paper pulp bleaching. This peroxoborate salt of sodium is a separate chemically defined compound, classifiable under heading 28.40.

Perborate Bleach Powder (Technical Grade)

Technical grade perborate bleach powder, typically over 98% sodium perborate, is imported for detergent manufacturing. It is a separate chemically defined peroxoborate of sodium, classifiable under heading 28.40.

Perborate Oxygen Source for Denture Tablets

Pharmaceutical-grade sodium perborate used as the active oxygen component in effervescent denture cleaning tablets. As a separate chemically defined peroxoborate, it falls under heading 28.40, even though the finished tablets are classified elsewhere.