Chapter 2841 — Customs Tariff Headings
Subheadings
Products classified under Tariff item 28.41
Anhydrous Sodium Dichromate
> Anhydrous sodium dichromate (Na2Cr2O7) is the water-free crystalline form of sodium dichromate, highly soluble and used in organic synthesis and pigment manufacturing. As a separate chemically defined inorganic salt of an oxometallic acid, it falls squarely under tariff item 2841.30.00.
2841.30.00Laboratory Grade Sodium Dichromate
> Laboratory grade sodium dichromate with purity above 99.5% is a chemically defined inorganic salt of oxometallic acid, meeting the criteria of Chapter 28 Note 1. It is used in analytical chemistry and oxidation reactions and is correctly classified under tariff item 2841.30.00.
2841.30.00Purified Sodium Dichromate Crystals
> Purified sodium dichromate crystals with impurities below 0.1% are a chemically defined compound of Chapter 28, not excluded by the chapter notes. As a salt of an oxometallic acid, it is classified under tariff item 2841.30.00, even when intended for pharmaceutical precursor synthesis.
2841.30.00Sodium Dichromate Dihydrate
> Sodium dichromate dihydrate (Na2Cr2O7·2H2O) is a hydrated form of sodium dichromate, a bright orange crystalline powder used in chromium plating and leather tanning. Hydrates of inorganic salts are covered by Chapter 28 when they are separate chemically defined compounds, so this falls under tariff item 2841.30.00.
2841.30.00Sodium Dichromate Flakes
> Sodium dichromate in flake form is chemically identical to the powder but processed for easier handling in industrial dyeing processes. The physical form does not affect classification, so it remains a separate chemically defined salt under tariff item 2841.30.00.
2841.30.00Technical Grade Sodium Dichromate
> Technical grade sodium dichromate (98-99% purity) is an industrial-grade powder for wood preservation and metal surface treatment. It qualifies as a separate chemically defined compound under Chapter 28, with impurities not affecting its classification under tariff item 2841.30.00.
2841.50.00Ammonium Peroxochromate Powder
Ammonium peroxochromate powder, a peroxometallic salt containing the peroxodichromate anion, used in specialized chemical applications. It is a chemically defined ammonium salt of peroxochromic acid, falling under tariff item 2841.50.00 as a peroxochromate.
2841.50.00Barium Chromate Yellow Pigment Base
Barium chromate (BaCrO4), known as lemon chrome, a chemically defined chromate salt used as a pigment precursor for high-temperature paints and primers. It falls under tariff item 2841.50.00 as an 'other' chromate.
2841.50.00Calcium Chromate Tetrahydrate
Calcium chromate tetrahydrate (CaCrO4·4H2O), an inorganic salt of chromic acid, used in corrosion-resistant primers and drilling fluids. It is a chemically defined calcium salt, falling under tariff item 2841.50.00 as an 'other' chromate.
2841.50.00Industrial Potassium Dichromate Flakes
Industrial potassium dichromate in large-flake form, packaged in 25 kg bags, used for electroplating baths and corrosion inhibition. It is a chemically defined potassium salt of dichromic acid, falling under tariff item 2841.50.00 as an 'other' dichromate.
2841.50.00Laboratory Reagent Potassium Dichromate
ACS-grade potassium dichromate in 500 g bottles for analytical chemistry, used in redox titrations such as COD testing. It is a chemically defined potassium salt of dichromic acid, classifiable under tariff item 2841.50.00 as an 'other' dichromate.
2841.50.00Lead Chromate(VI) Basic Salt
Basic lead chromate, a chromate salt used in industrial pigments for its color and corrosion resistance. It is a chemically defined lead salt of chromic acid, falling under tariff item 2841.50.00 as an 'other' chromate.
2841.50.00Lithium Chromate Solution (50% Assay)
Lithium chromate (Li2CrO4) at 50% aqueous concentration, a salt of chromic acid used as a corrosion inhibitor in aerospace coolants. It is a chemically defined lithium salt, falling under tariff item 2841.50.00 as an 'other' chromate.
2841.50.00Magnesium Chromate Flakes
Magnesium chromate flakes for chemical synthesis, a chemically defined magnesium salt of chromic acid. It falls under tariff item 2841.50.00 as an 'other' chromate.
2841.50.00Potassium Dichromate Crystals
Pure potassium dichromate (K2Cr2O7) in crystalline form, a bright orange-red inorganic salt used as an oxidizing agent in chemical synthesis and laboratory applications. It is a chemically defined potassium salt of dichromic acid, falling under tariff item 2841.50.00 as an 'other' dichromate.
2841.50.00Sodium Dichromate Dihydrate
Sodium dichromate dihydrate (Na2Cr2O7·2H2O), a crystalline orange salt of a peroxometallic acid, specifically a dichromate of sodium. It falls under tariff item 2841.50.00 as an 'other' dichromate.
2841.50.00Strontium Chromate Inhibitor Crystals
Strontium chromate (SrCrO4) crystals used as corrosion inhibitors in aircraft primers. It is a chemically defined strontium salt of chromic acid, falling under tariff item 2841.50.00 as an 'other' chromate.
2841.50.00Technical Grade Potassium Dichromate
Technical-grade potassium dichromate with at least 99% purity, supplied in flake or powder form for industrial use in leather tanning and pigment production. It is a chemically defined potassium salt of dichromic acid, classifiable under tariff item 2841.50.00 as an 'other' dichromate.
2841.50.00Zinc Dichromate Passivation Salt
Zinc dichromate, a chromate salt used for metal surface passivation, meeting the definition of metal salts of peroxometallic acids. It falls under tariff item 2841.50.00 as an 'other' dichromate.
2841.61.00ACS Reagent Potassium Permanganate
ACS reagent grade potassium permanganate (KMnO4) is a chemically defined compound of an inorganic base, meeting the purity standards for analytical chemistry and titration applications. It falls under tariff item 2841.61.00 as a permanganate salt of an oxometallic acid, specifically the potassium salt, and is not excluded by Chapter 28 notes.
2841.61.00Industrial Potassium Permanganate Flakes
Industrial potassium permanganate flakes are the same chemically defined compound (KMnO4) presented in a flaked physical form for easier dissolution in large-scale water purification systems. The physical form does not alter classification, and it remains within tariff item 2841.61.00 as the potassium salt of permanganic acid.
2841.61.00Potassium Permanganate Crystals
Potassium permanganate crystals are the pure chemical compound KMnO4 in crystalline form, a strong oxidizing agent used in water treatment and laboratory settings. As a chemically defined permanganate salt of an inorganic base, it is correctly classified under tariff item 2841.61.00, consistent with Chapter 28 notes.
2841.61.00Technical Grade Potassium Permanganate
Technical grade potassium permanganate powder with a minimum 99% purity is a chemically defined compound used in industrial oxidation and wastewater treatment. Despite the lower grade, it is still the pure potassium salt of permanganic acid and falls under tariff item 2841.61.00, as Chapter 28 covers separate chemically defined compounds regardless of purity.
2841.61.00USP Grade Potassium Permanganate
USP grade potassium permanganate is a high-purity form of KMnO4 intended for pharmaceutical and medical uses such as wound disinfection. As a chemically defined compound of mercury-free inorganic base, it is classified under tariff item 2841.61.00, and Chapter 28 notes do not exclude it based on grade or intended use.
2841.69.00Ammonium Manganate Solution
Ammonium manganate solution ((NH4)2MnO4), a liquid reagent used in analytical chemistry for redox titrations and laboratory testing. As an ammonium salt of manganic acid, it is covered by Chapter 28 Note 5, which extends headings 2826–2842 to ammonium salts, and is a chemically defined compound in aqueous solution.
2841.69.00Ammonium Permanganate Powder
Ammonium permanganate (NH4MnO4) is an unstable oxidizing salt used in analytical chemistry and pyrotechnics. It is an ammonium salt of a peroxometallic acid, which is covered by Chapter 28 Note 5 and falls under heading 28.41 as an 'other' permanganate.
2841.69.00Barium Manganate Powder
Barium manganate (BaMnO4) powder, a green solid used as a precursor in ceramic pigments and specialty colorants. It is a chemically defined inorganic salt of manganic acid, classifiable under tariff item 2841.69.00 as 'other' manganates, and is not excluded by Chapter 28 notes as it contains no organic or radioactive components.
2841.69.00Barium Manganate Technical Grade
Barium manganate (BaMnO4) technical grade is a green inorganic salt used as a pigment and in battery production. As a manganate of an inorganic base, it is classified under heading 28.41 as 'other' manganates, provided it meets the chemically defined criteria of Chapter 28 Note 1.
2841.69.00Calcium Permanganate Flakes
Calcium permanganate (Ca(MnO4)2) flakes are used for soil remediation and aquaculture oxygen release. As a calcium salt of permanganic acid, it is a chemically defined inorganic compound covered by heading 28.41 as 'other' permanganates.
2841.69.00Calcium Permanganate Granules
Calcium permanganate granules (Ca(MnO4)2), a dark purple granular oxidizer used in specialty oxidation reactions and air purification systems. As a chemically defined calcium salt of permanganic acid, it falls under tariff item 2841.69.00 as 'other' permanganates, consistent with Chapter 28 Note 5 covering metal salts.
2841.69.00Industrial Sodium Permanganate Granules
Granular sodium permanganate for bulk industrial bleaching and oxidation in textile processing is a chemically defined sodium salt of permanganic acid. It is classified under heading 28.41 as 'other' permanganates, meeting the criteria of Chapter 28 Note 1.
2841.69.00Lab-Grade Sodium Permanganate
Lab-grade sodium permanganate for analytical titrations and organic synthesis is a chemically defined sodium salt of permanganic acid. It is classified under heading 28.41 as 'other' permanganates, meeting the purity and identity criteria of Chapter 28 Note 1.
2841.69.00Magnesium Permanganate Aqueous
Magnesium permanganate aqueous solution is used in organic synthesis and bleaching. As a solution of a chemically defined permanganate salt in water, it falls under Chapter 28 Note 1(b) and is classified in heading 28.41 as 'other' permanganates.
2841.69.00Magnesium Permanganate Crystals
Magnesium permanganate crystals (Mg(MnO4)2), a crystalline oxidizer used in pyrotechnic compositions and bleaching processes. It is a chemically defined magnesium salt of permanganic acid, classifiable under tariff item 2841.69.00 as 'other' permanganates, and is not excluded by Chapter 28 notes as it contains no organic or radioactive components.
2841.69.00Permanganate Green Pigment BaMnO4
Barium manganate-based green pigment (BaMnO4) for ceramics and glass coloring is a chemically defined manganate salt. It is classified under heading 28.41 as 'other' manganates, provided it is not of a kind used as a luminophore, which is excluded by Chapter 28 Note 3(d).
2841.69.00Pharmaceutical Grade Sodium Permanganate
Pharmaceutical grade sodium permanganate meeting USP standards for use in medicinal antiseptics and pharmaceutical synthesis is a chemically defined sodium salt of permanganic acid. It is classified under heading 28.41 as 'other' permanganates, provided it is not put up in measured doses or for retail sale as per Section Note 2.
2841.69.00Potassium Manganate(VI) Technical Grade
Technical-grade potassium manganate (K2MnO4), a green crystalline solid used as a selective oxidant in organic synthesis and pharmaceutical intermediate production. It is a chemically defined potassium salt of manganic acid, classifiable under tariff item 2841.69.00 as 'other' manganates, and is not excluded by Chapter 28 notes as it contains no organic or radioactive components.
2841.69.00Potassium Permanganate Crystals
Potassium permanganate (KMnO4) is a dark purple crystalline compound used as an oxidizing agent in water treatment and laboratory applications. As a potassium salt of permanganic acid, it is a chemically defined inorganic compound classified under heading 28.41 as 'other' permanganates.
2841.69.00Sodium Permanganate Crystals
Pure sodium permanganate (NaMnO4) in crystalline form is a strong oxidizing agent used in chemical synthesis and water purification. As a chemically defined sodium salt of permanganic acid, it is classified under heading 28.41 as 'other' permanganates.
2841.69.00Sodium Permanganate Flakes
Flaked sodium permanganate for easy dissolution in emergency water disinfection kits is a chemically defined sodium salt of permanganic acid. It is classified under heading 28.41 as 'other' permanganates, provided it is not put up for retail sale as per Section Note 2.
2841.69.00Sodium Permanganate Solution 40%
A 40% aqueous solution of sodium permanganate (NaMnO4) is used in industrial oxidation processes and wastewater remediation. As a solution of a chemically defined permanganate salt in water, it falls under Chapter 28 Note 1(b) and is classified in heading 28.41 as 'other' permanganates.
2841.69.00Strontium Manganite Powder
Strontium manganite powder (SrMnO3), a black powder used in solid oxide fuel cell cathodes and electronic components. It is a chemically defined strontium salt of manganous acid, classifiable under tariff item 2841.69.00 as 'other' manganites, and is not excluded by Chapter 28 notes as it contains no organic or radioactive components.
2841.69.00Strontium Permanganate Crystals
High-purity strontium permanganate crystals for specialty oxidations in pharma intermediates are a chemically defined strontium salt of permanganic acid. They are classified under heading 28.41 as 'other' permanganates, meeting the criteria of Chapter 28 Note 1.
2841.69.00Technical Grade Sodium Permanganate Powder
Technical-grade sodium permanganate (NaMnO4) powder, a dark purple crystalline substance used as a strong oxidizer in industrial wastewater treatment and chemical synthesis. It is a chemically defined inorganic salt of permanganic acid, classifiable under tariff item 2841.69.00 as 'other' permanganates, and does not contain organic constituents that would exclude it from Chapter 28.
2841.69.00Technical Sodium Manganate Solution
Technical 30% sodium manganate (Na2MnO4) solution for chemical manufacturing intermediates is a chemically defined manganate salt in aqueous solution. It falls under Chapter 28 Note 1(b) and is classified in heading 28.41 as 'other' manganates.
2841.69.00Zinc Manganate Powder
Zinc manganate (ZnMnO4) powder utilized in ceramic pigments and cathode materials is a chemically defined zinc salt of manganic acid. As a manganate of an inorganic base, it is classified under heading 28.41 as 'other' manganates, subject to Chapter 28 Note 1.
2841.70.00Ammonium Heptamolybdate
Ammonium heptamolybdate tetrahydrate is a white crystalline powder that serves as a key precursor in molybdenum metal production and as a catalyst in various chemical reactions. It is a chemically defined ammonium salt of molybdic acid, falling under the molybdates heading.
2841.70.00Ammonium Molybdate Crystals
Crystalline ammonium molybdate is used in electroplating solutions to provide molybdenum ions. As an ammonium salt of molybdic acid, it is a chemically defined compound classifiable under the molybdates tariff item.
2841.70.00Ammonium Molybdate for Pigment Production
Specialty ammonium molybdate is manufactured for use in producing molybdenum pigments for paints. It is an ammonium salt of molybdic acid, meeting the definition of a molybdate under the tariff item.
2841.70.00Ammonium Molybdate Solution Precursor Crystals
Ammonium molybdate solution precursor crystals are solid ammonium molybdate that dissolves into solutions for corrosion inhibitor applications. As a chemically defined ammonium molybdate salt, it falls under the molybdates tariff item.
2841.70.00Ammonium Molybdate Tetrahydrate
Ammonium molybdate tetrahydrate is a reagent used in analytical chemistry and as a nutrient in agriculture. It is a chemically defined ammonium molybdate salt, classifiable under the molybdates tariff item.
2841.70.00Ammonium Paramolybdate
Ammonium paramolybdate is a key industrial chemical used in pigment production and alloy manufacturing. It is an ammonium molybdate salt, meeting the criteria for classification under the molybdates tariff item.
2841.70.00Ammonium Tetramolybdate
Ammonium tetramolybdate is used in flame retardants and corrosion inhibitors. It is an ammonium salt of an oxometallic acid, falling under the molybdates tariff item as a chemically defined compound.
2841.70.00Lab Grade Ammonium Paramolybdate
Lab grade ammonium paramolybdate is a high-purity reagent used for phosphorus testing in water analysis. As a chemically defined ammonium molybdate, it is classifiable under the molybdates tariff item.
2841.70.00Lithium Molybdate Crystals
Lithium molybdate crystals are used as scintillators in radiation detectors and as high-temperature electrolytes. As a lithium salt of molybdic acid, it is a chemically defined molybdate, falling under the molybdates tariff item.
2841.70.00Magnesium Molybdate Anhydrous
Magnesium molybdate anhydrous powder is used in flame retardants and ceramic glazes. It is a chemically defined magnesium salt of molybdic acid, classifiable under the molybdates tariff item.
2841.70.00Potassium Molybdate Powder
Potassium molybdate powder is an inorganic salt used in pigments, electroplating, and as a corrosion inhibitor. It is a chemically defined potassium salt of molybdic acid, falling under the molybdates tariff item.
2841.70.00Sodium Molybdate Dihydrate
Sodium molybdate dihydrate is a white crystalline powder used as a source of molybdenum in fertilizers and nutritional supplements. It is a chemically defined sodium salt of molybdic acid, classifiable under the molybdates tariff item.
2841.70.00Technical Grade Ammonium Heptamolybdate
Technical grade ammonium heptamolybdate is used in petroleum refining catalysts. It is a chemically defined ammonium molybdate salt, falling under the molybdates tariff item.
2841.70.00Ultra-Pure Ammonium Heptamolybdate
Ultra-pure ammonium heptamolybdate is used as a precursor in semiconductor doping. It is a highly pure ammonium molybdate salt, classifiable under the molybdates tariff item.