Chapter 2843 — Customs Tariff Headings

2843.2Silver compounds:

2843.30.00Gold compounds

2843.90.00Other compounds; amalgams

Calculate exact duty for your shipment Not sure about classification? Ask the Tariff Assistant

Products classified under Tariff item 28.43

Colloidal Gold Diagnostic Reagent

A bulk colloidal gold reagent consisting of gold nanoparticles suspended in a liquid, imported before any conjugation with antibodies. It is a colloidal precious metal, as the gold particles are finely dispersed in the medium, falling squarely under tariff item 2843.10.00.

Colloidal Gold Ink for Electronics

A bulk colloidal gold ink containing gold nanoparticles dispersed in a solvent, used for printing conductive circuits. It is a colloidal precious metal because the gold is in colloidal form, not yet printed onto any substrate, and is classifiable under this tariff item.

Colloidal Gold Solution

A stable suspension of gold nanoparticles in water or another solvent, used in diagnostics and nanotechnology. The product consists of gold in colloidal form, meeting the definition of colloidal precious metals under this tariff item.

Colloidal Palladium Solution

A stable liquid colloid of palladium nanoparticles used in catalysis and electronics. Palladium is a precious metal, and its colloidal dispersion falls under this tariff item as a colloidal precious metal.

Colloidal Platinum Catalyst Precursor

An ethanol dispersion of platinum nanoparticles intended for depositing onto fuel cell electrodes. The platinum is in colloidal form, making it a colloidal precious metal under this tariff item.

Colloidal Platinum Dispersion

An aqueous suspension of platinum nanoparticles used as a catalyst in chemical reactions and fuel cells. The platinum is in colloidal form, and the product is classifiable as a colloidal precious metal under this tariff item.

Colloidal Silver Nanoparticles

A water-based colloid of silver nanoparticles used for antimicrobial treatments in textiles. Silver is a precious metal, and the colloidal form falls under this tariff item.

Colloidal Silver Suspension

A liquid dispersion of silver nanoparticles for antimicrobial applications in supplements and wound dressings. The silver is in colloidal form, making it a colloidal precious metal under this tariff item.

ACS Reagent Grade Silver Nitrate

ACS Reagent Grade Silver Nitrate is a high-purity inorganic compound of silver, meeting stringent laboratory reagent standards. It is a separate chemically defined compound of silver, classifiable under this tariff item as a silver compound.

Medical Grade Silver Nitrate Applicators

Medical Grade Silver Nitrate Applicators are wooden sticks tipped with silver nitrate for cauterization. The silver nitrate compound is the essential component, and the product is classifiable under this tariff item as a silver compound, despite its medical use.

Photographic Grade Silver Nitrate

Photographic Grade Silver Nitrate is a high-purity silver compound specifically formulated for emulsion manufacturing in analog photography. It is a chemically defined silver compound, classifiable under this tariff item regardless of its intended use.

Silver Nitrate Cauterizing Solution 25%

Silver Nitrate Cauterizing Solution 25% is an aqueous solution of silver nitrate, a chemically defined compound. The solution is a normal method of putting up silver nitrate for medical use, and it remains classifiable under this tariff item as a silver compound.

Silver Nitrate Crystals

Silver Nitrate Crystals are pure silver nitrate (AgNO3) in crystalline form, a separate chemically defined compound. Used in analytical chemistry and as a precursor, it is classifiable under this tariff item as a silver compound.

Silver Nitrate for Mirror Manufacturing

Silver Nitrate for Mirror Manufacturing is a technical grade silver compound used in Tollens' reagent for chemical silvering. It is a chemically defined silver compound, classifiable under this tariff item as silver nitrate.

Silver Nitrate Lab Grade 63.5% Ag Basis

Silver Nitrate Lab Grade 63.5% Ag Basis is a laboratory reagent standardized for silver content. It is a chemically defined silver compound, and the standardization does not affect its classification under this tariff item as silver nitrate.

Silver Nitrate Powder 99.999% Pure

Silver Nitrate Powder 99.999% Pure is an ultra-high purity silver compound used in semiconductor manufacturing. It is a separate chemically defined compound of silver, classifiable under this tariff item as silver nitrate.

Silver Nitrate Solution 0.1N

Silver Nitrate Solution 0.1N is a standardized aqueous solution of silver nitrate for analytical titrations. The solution is a normal method of putting up silver nitrate, and it remains classifiable under this tariff item as a silver compound.

Silver Nitrate Volumetric Standard

Silver Nitrate Volumetric Standard is a certified 0.1M silver nitrate solution for precise titrations. It is a chemically defined silver compound in solution, classifiable under this tariff item as silver nitrate.

Silver Bromide Crystals

Silver bromide (AgBr) crystals are a chemically defined inorganic compound of silver, used primarily in photographic film emulsions and specialty optics. As a silver compound not otherwise specified, it falls under tariff item 2843.29.00 for other silver compounds.

Silver Carbonate Precipitate

Silver carbonate (Ag2CO3) is a chemically defined inorganic silver compound used in organic synthesis and as a colorant. Although carbonates are generally classified in heading 28.36, silver carbonate is specifically excluded from that heading by Chapter Note 2 and falls under this tariff item for other silver compounds.

Silver Chloride Powder

Silver chloride (AgCl) is a white, insoluble, chemically defined inorganic silver compound used in photography, optics, and antimicrobial applications. It is not a nitrate or complex salt, so it falls under this tariff item for other silver compounds.

Silver Cyanide Powder

Silver cyanide (AgCN) is a chemically defined inorganic silver compound used in silver plating and chemical manufacturing. Although cyanides are generally classified in heading 28.37, silver cyanide is excluded from that heading by Chapter Note 2 and falls under this tariff item for other silver compounds.

Silver Iodide Crystals

Silver iodide (AgI) is a chemically defined inorganic silver compound used in cloud seeding, photography, and antiseptics. As a silver compound not otherwise specified, it falls under this tariff item for other silver compounds.

Silver Nitrate Crystals

Silver nitrate (AgNO3) is a chemically defined inorganic silver compound used in photography, medicine, and as a chemical reagent. Although it is a nitrate, it is not classified under heading 28.34 because it is a compound of a precious metal; it falls under this tariff item for other silver compounds.

Silver Oxide Powder

Silver oxide (Ag2O) is a chemically defined inorganic silver compound used in battery production and chemical synthesis. It is not a nitrate or complex salt, so it falls under this tariff item for other silver compounds.

Silver Perchlorate Solution

Silver perchlorate (AgClO4) in aqueous solution is a chemically defined inorganic silver compound used as a catalyst and analytical reagent. Although it is a solution, it is classified under this tariff item because the water is a normal method of putting up the product for safety or transport, per Chapter Note 1(b).

Silver Phosphate Powder

Silver phosphate (Ag3PO4) is a chemically defined inorganic silver compound used in photography and semiconductors. It is not a nitrate or complex salt, so it falls under this tariff item for other silver compounds.

Silver Sulfate Crystals

Silver sulfate (Ag2SO4) is a chemically defined inorganic silver compound used in analytical chemistry and electronics. As a silver compound not otherwise specified, it falls under this tariff item for other silver compounds.

Auranofin

Auranofin is an oral gold-containing pharmaceutical used to treat rheumatoid arthritis. It is an organic compound of gold, specifically a gold-phosphine complex, and is classified under tariff item 2843.30.00 as a gold compound.

Gold Chloride (Chloroauric Acid)

Gold chloride, or chloroauric acid (HAuCl4), is an inorganic gold compound used in chemical synthesis, photography, and as a precursor for gold nanoparticles. It is a chemically defined compound of gold, falling under tariff item 2843.30.00.

Gold(I) Chloride

Gold(I) chloride (AuCl) is a chemically defined inorganic gold compound used as a lab reagent in gold chemistry research and synthesis. It falls under tariff item 2843.30.00 as a gold compound.

Gold(III) Oxide

Gold(III) oxide (Au2O3) is a brown powder used as a catalyst in chemical reactions and in glass coloring. It is an inorganic compound of gold, classified under tariff item 2843.30.00.

Gold Sodium Thiosulfate

Gold sodium thiosulfate (Na3Au(S2O3)2) is a coordination compound used in analytical chemistry and gold plating solutions. It is a chemically defined gold compound, falling under tariff item 2843.30.00.

Potassium Gold Cyanide

Potassium gold cyanide (KAu(CN)2) is a highly toxic gold compound essential for electroplating gold onto electronics and jewelry. It is a chemically defined gold complex, classified under tariff item 2843.30.00.

Sodium Aurothiomalate

Sodium aurothiomalate is an organic gold compound used in injectable treatments for rheumatoid arthritis. It qualifies under tariff item 2843.30.00 as an organic compound of gold, whether chemically defined or not.

Tetrachloroauric Acid Solution

Tetrachloroauric acid solution is an aqueous solution of HAuCl4·3H2O used in etching and nanoparticle synthesis. It is a gold compound in solution form, classified under tariff item 2843.30.00.

Dental Gold-Silver Amalgam Alloy

Pre-capsulated dental amalgam alloy containing gold and silver, used for restorative fillings. This product is an amalgam of precious metals, specifically prepared for dental applications.

Dental Silver-Palladium Amalgam Capsules

High-strength dental amalgam capsules containing silver-palladium alloy powder for posterior restorations. These are amalgams of precious metals, classified under this heading.

Gold Chloride (Chloroauric Acid)

Gold chloride (chloroauric acid, HAuCl4) is an inorganic compound of gold used in chemical synthesis, photography, and gilding. It is a chemically defined compound of a precious metal, falling under this tariff item.

Gold(III) Bromide

Gold(III) bromide (AuBr3) is a specialty chemical for research and synthesis. It is an inorganic compound of a precious metal, classified under this tariff item.

Gold Sodium Thiomalate

Gold sodium thiomalate is an organic gold compound used in rheumatoid arthritis treatment. Despite its organic components, it is classified under this heading as a compound of a precious metal per Chapter 28 notes.

Iridium Trichloride

Iridium(III) chloride (IrCl3) is used in high-temperature catalysts and electronics. It is an inorganic compound of the precious metal iridium, falling under this tariff item.

Palladium Chloride

Palladium(II) chloride (PdCl2) is an inorganic compound used as a catalyst precursor in chemical reactions and electronics manufacturing. It is a chemically defined compound of a precious metal, classified under this tariff item.

Palladium on Barium Sulfate

Palladium on barium sulfate is a heterogeneous catalyst consisting of finely divided palladium metal supported on a barium sulfate carrier, typically containing about 5% palladium by weight. It is used in selective hydrogenation reactions, such as the reduction of alkynes to alkenes, in pharmaceutical and fine chemical synthesis. This product is classified under tariff item 2843.90.00 as an inorganic compound of a precious metal (palladium) that is not a colloidal precious metal and is not otherwise specified, and it does not meet the definition of a separate chemically defined compound.