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Sulphates; alums; peroxosulphates (persulphates). > Other sulphates: > Other > Other
Duty Rate (from China)
Subheadings
Products classified under Tariff item 2833.29
Aluminum Potassium Sulfate (Potash Alum)
Aluminum potassium sulfate, or potash alum, is a double salt used in water purification, baking powder, and as an astringent. Pure forms not meeting specific alum definitions are classified under tariff item 2833.29.00 as 'other sulphates'.
2833.29.00Ammonium Metavanadate Sulfate
Ammonium metavanadate sulfate is a double salt combining ammonium metavanadate with sulfuric acid derivatives, used in vanadium pigment manufacturing and steel alloying. It is classified under tariff item 2833.29.00 as an 'other sulfate' because it is a chemically defined inorganic sulfate not elsewhere specified in Chapter 28.
2833.29.00Ammonium Persulfate
Ammonium persulfate is a peroxosulfate used as a bleaching agent, polymerization initiator, and etchant in electronics. As a peroxosulfate not elsewhere specified, it is classified under tariff item 2833.29.00 as 'other sulphates'.
2833.29.00Anhydrous Cobalt Sulfate
Anhydrous cobalt(II) sulfate (CoSO4) is a white crystalline powder used in catalyst production and analytical chemistry. It is a separate chemically defined compound of cobalt, falling under tariff item 2833.29.00 as an 'Other' sulfate.
2833.29.00Anhydrous Zinc Sulfate
Anhydrous zinc sulfate (ZnSO4) is the water-free form used in pharmaceuticals, electroplating, and as a catalyst precursor. It qualifies for tariff item 2833.29.00 as a chemically pure sulfate of zinc per Chapter 28 notes.
2833.29.00Basic Chromium Sulfate
Basic chromium sulfate, often with formula Cr(OH)SO4, is a partially hydrolyzed chromium salt used primarily in leather tanning processes. It is classified under tariff item 2833.29.00 as a sulfate of chromium, meeting the inorganic chemical definition of Chapter 28.
2833.29.00Chromic Sulfate Anhydrous
Anhydrous chromic sulfate (Cr2(SO4)3) is used in pyrotechnics and high-temperature ceramics. It is a pure inorganic chromium sulfate under tariff item 2833.29.00, distinguished by lack of crystal water and appearing as a dark green powder.
2833.29.00Chromium Ammonium Sulfate
Chromium ammonium sulfate serves as a precursor in catalyst production and analytical standards. It is classified under tariff item 2833.29.00 as a chromium sulfate, though ammonium complexes border on heading 28.42. It is a green crystalline material.
2833.29.00Chromium(III) Sulfate Pentahydrate
Chromium(III) sulfate pentahydrate is an inorganic salt consisting of chromium cations and sulfate anions, typically appearing as a blue-green crystalline powder. It falls under tariff item 2833.29.00 as a sulfate of chromium, being a chemically defined compound.
2833.29.00Chromium Potassium Sulfate Dodecahydrate
Chromium potassium sulfate dodecahydrate, also known as chrome alum, is a double salt used in analytical chemistry and trivalent chromium plating baths. It qualifies under tariff item 2833.29.00 as a sulfate of chromium, though it is borderline with heading 28.42 for complex salts.
2833.29.00Chromium(VI) Sulfate
Chromium(VI) sulfate, or chromic acid sulfate, is a strong oxidizing agent used in chromium electroplating and corrosion inhibitors. It is classified as a sulfate of chromium under tariff item 2833.29.00, meeting the chemically defined inorganic compound criteria.
2833.29.00Cobalt Ammonium Sulfate
Cobalt ammonium sulfate (CoSO4·(NH4)2SO4·6H2O) is a double salt of cobalt and ammonium sulfate used in analytical labs and plating. As a double salt, it is classified under heading 28.42 per Chapter Note 5, but as a sulfate of cobalt, it falls under tariff item 2833.29.00.
2833.29.00Cobalt(II) Sulfate Heptahydrate
Cobalt(II) sulfate heptahydrate (CoSO4·7H2O) is a pink crystalline salt used in electroplating baths and as a cobalt source in fertilizers. It falls under tariff item 2833.29.00 as a sulfate of cobalt.
2833.29.00Cobalt Sulfate for Electroplating
High-purity cobalt sulfate crystals for decorative and engineering electroplating baths. This is a pure cobalt sulfate salt used in metal finishing, classified under tariff item 2833.29.00 as an 'Other' sulfate.
2833.29.00Cobalt Sulfate Heptahydrate
Cobalt sulfate heptahydrate is a chemically defined salt used in pigments, catalysts, and lithium-ion battery precursors. It is classified under tariff item 2833.29.00 as an 'other sulfate' of cobalt, not specifically provided for elsewhere.
2833.29.00Cobalt Sulfate Monohydrate
Cobalt sulfate monohydrate (CoSO4·H2O) is a red powder applied in animal feed supplements and ceramic pigments. It is a chemically defined sulfate of cobalt, classified under tariff item 2833.29.00.
2833.29.00Copperas Crystals (Ferrous Sulfate)
Copperas, or green vitriol, refers to large crystals of ferrous sulfate heptahydrate used in gardening and pigment production. It is classified under tariff item 2833.29.00 as an 'Other' sulfate of iron.
2833.29.00Copper Sulfate Pentahydrate
Copper sulfate pentahydrate, also known as bluestone, is a chemically defined salt used as a fungicide, algaecide, and in electroplating. High-purity grades not covered by specific copper provisions are classified under tariff item 2833.29.00 as 'other sulphates'.
2833.29.00Feed Grade Cobalt Sulfate
Cobalt sulfate granular form (24% Co minimum) for trace mineral supplementation in livestock feed. It remains under tariff item 2833.29.00 as chemically defined cobalt sulfate.
2833.29.00Ferric Ammonium Sulfate
Ferric ammonium sulfate ((NH4)Fe(SO4)2·12H2O) is used in analytical chemistry and as a mordant in dyeing. It qualifies under tariff item 2833.29.00 as a sulfate of iron, treated as a metal salt per Chapter 28 notes.
2833.29.00Ferric Sulfate Anhydrous
Ferric sulfate (Fe2(SO4)3) in anhydrous form is a yellow to brown powder used in water purification and as a coagulant. It is classified under tariff item 2833.29.00 as an 'Other' sulfate of iron, meeting Chapter 28 criteria for chemically defined compounds.
2833.29.00Ferric Vanadium Sulfate
Ferric vanadium sulfate is a mixed ferric-vanadium sulfate used in water treatment as a coagulant and in vanadium battery electrolytes. It is classified under tariff item 2833.29.00 as an 'other sulfate' because it is a chemically defined inorganic sulfate of vanadium and iron, not specifically provided for elsewhere in Chapter 28.
2833.29.00Ferrous Sulfate Granules for Agriculture
Granulated ferrous sulfate heptahydrate designed for soil amendment to correct iron deficiencies in crops. It falls under tariff item 2833.29.00 as a pure iron sulfate, not yet a formulated fertilizer.
2833.29.00Ferrous Sulfate Heptahydrate
Ferrous sulfate heptahydrate (FeSO4·7H2O) is a pale green crystalline compound used primarily as a nutrient supplement in agriculture and water treatment. It falls under tariff item 2833.29.00 as a sulfate of iron.
2833.29.00Iron(III) Sulfate Solution (45% Fe2(SO4)3)
A 45% aqueous solution of iron(III) sulfate used in wastewater treatment and etching. Though a solution, it remains under tariff item 2833.29.00 when chemically defined as iron sulfate concentrate.
2833.29.00Iron(II) Sulfate Monohydrate
Iron(II) sulfate monohydrate (FeSO4·H2O), also known as melanterite, serves as a reducing agent and iron supplement in animal feed. It is classified under tariff item 2833.29.00 for iron sulfates.
2833.29.00Mohr's Salt (Ammonium Iron(II) Sulfate)
Mohr's salt ((NH4)2Fe(SO4)2·6H2O) is a double salt used in analytical titrations for its stability. It is classified under tariff item 2833.29.00 as an iron sulfate per metal salt provisions.
2833.29.00Potassium Chromium Sulfate
Potassium chromium sulfate is used in chrome tanning and mordant dyeing, providing trivalent chromium fixation. Tariff item 2833.29.00 covers it as a chromium sulfate, being a chemically defined inorganic compound, supplied as hydrated violet crystals.
2833.29.00Sodium Chromium Sulfate
Sodium chromium sulfate is a mixed metal sulfate used in green pigment manufacturing and water treatment. It falls under tariff item 2833.29.00 as a sulfate of chromium, chemically defined without organic content, supplied as a powder.
2833.29.00Sodium Vanadyl Sulfate
Sodium vanadyl sulfate is an inorganic salt employed in corrosion inhibitors for steel and in analytical chemistry reagents. It is classified under tariff item 2833.29.00 as an 'other sulfate' because it is a chemically defined sulfate of vanadium, distinct from vanadates and other Chapter 28 compounds.
2833.29.00Technical Grade Cobalt Sulfate
Technical grade cobalt sulfate (approx. 20-24% Co) for industrial pigment and battery applications. It is classified under tariff item 2833.29.00 as an 'Other' sulfate of cobalt, provided it is chemically defined.
2833.29.00Technical Grade Zinc Sulfate
Technical grade zinc sulfate is a chemically defined inorganic salt used in industrial applications such as rayon production, pigments, and flame retardants. It is classified under tariff item 2833.29.00 as an 'other sulfate' of zinc, not elsewhere specified in the chapter.
2833.29.00Vanadium(IV) Sulfate Hydrate
Vanadium(IV) sulfate hydrate, such as the pentahydrate form, serves as a reagent in chemical labs and vanadium redox flow batteries. It is a pure vanadium sulfate classified under tariff item 2833.29.00 as an 'other sulfate', being a chemically defined inorganic compound per Chapter 28 notes.
2833.29.00Vanadium Pentoxide Sulfate
Vanadium pentoxide sulfate (V2O5·SO3) is a chemically defined inorganic compound used in catalysts for oxidation reactions and in the production of vanadium metal. It falls under tariff item 2833.29.00 as a sulfate of vanadium, being an 'other sulfate' not specifically listed elsewhere.
2833.29.00Vanadyl Sulfate Powder
Vanadyl sulfate (VOSO4) is a blue crystalline powder used as a catalyst in organic synthesis and in nutritional supplements for vanadium content. It is classified under tariff item 2833.29.00 as an 'other sulfate' of vanadium, being a chemically defined inorganic compound.
2833.29.00Zinc Sulfate Crystals
Zinc sulfate crystals, typically heptahydrate, are a chemically defined compound used in educational labs and small-scale industrial processes. They are classified under tariff item 2833.29.00 as 'other sulphates' of zinc, given their purity and form.
2833.29.00Zinc Sulfate for Animal Feed
Feed-grade zinc sulfate is a chemically defined zinc salt used as a trace mineral supplement in animal nutrition. It is classified under tariff item 2833.29.00 as an 'other sulfate' of zinc, as it is not mixed with other ingredients at import.
2833.29.00Zinc Sulfate Heptahydrate
Zinc sulfate heptahydrate (ZnSO4·7H2O), also known as zinc vitriol, is a hydrated chemically defined salt used in water treatment, leather processing, and as a laboratory reagent. It is classified under tariff item 2833.29.00 as an 'other sulfate' of zinc.
2833.29.00Zinc Sulfate Monohydrate
Zinc sulfate monohydrate (ZnSO4·H2O) is a chemically defined inorganic salt used primarily as a fertilizer micronutrient and in animal feed supplements. It is classified under tariff item 2833.29.00 as an 'other sulfate' of zinc, distinct from other zinc compounds.
2833.29.00Zinc Sulfate USP Grade
USP-grade zinc sulfate is a highly purified form of zinc sulfate meeting pharmacopeial standards for medicinal use in supplements and topical ointments. It is classified under tariff item 2833.29.00 as an 'other sulfate' of zinc, given its chemically defined nature.