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Sulphates; alums; peroxosulphates (persulphates). > Sodium sulphates: > Other > Other
Duty Rate (from China)
Subheadings
Products classified under Tariff item 2833.29.00
Anhydrous Cobalt Sulfate
Anhydrous cobalt(II) sulfate (CoSO4) is a white crystalline powder used in catalyst production and analytical chemistry. As a separate chemically defined compound of cobalt, it is classifiable under this tariff item for other sulphates.
Cobalt Ammonium Sulfate
Cobalt ammonium sulfate is a double salt of cobalt and ammonium sulfate (CoSO4·(NH4)2SO4·6H2O) used in analytical labs and plating. Although it is a complex salt, Chapter Note 5 directs double salts to heading 28.42, so it does not belong under this item.
Cobalt(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. As a separate chemically defined cobalt sulphate, it is classifiable under this tariff item.
Cobalt Sulfate for Electroplating
High-purity cobalt sulfate crystals for decorative and engineering electroplating baths. As a separate chemically defined cobalt sulphate, it falls under this tariff item for other sulphates.
Cobalt Sulfate Monohydrate
Cobalt sulfate monohydrate (CoSO4·H2O) is a red powder applied in animal feed supplements and ceramic pigments. As a separate chemically defined cobalt sulphate, it falls under this tariff item.
Copperas Crystals (Ferrous Sulfate)
Copperas crystals, or green vitriol, are large crystals of ferrous sulfate heptahydrate used in gardening and pigment production. As a separate chemically defined iron sulphate, it falls under this tariff item for other sulphates.
Feed Grade Cobalt Sulfate
Cobalt sulfate granular form (24% Co minimum) for trace mineral supplementation in livestock feed. As a separate chemically defined cobalt sulphate, it is classifiable under this tariff item.
Ferric Ammonium Sulfate
Ferric ammonium sulfate ((NH4)Fe(SO4)2·12H2O) is used in analytical chemistry and as a mordant in dyeing. As a double salt, Chapter Note 5 directs it to heading 28.42, so it does not belong under this item.
Ferric Sulfate Anhydrous
Ferric sulfate (Fe2(SO4)3) in anhydrous form is a yellow to brown powder used in water purification and as a coagulant. As a separate chemically defined iron sulphate, it falls under this tariff item.
Ferrous Sulfate Granules for Agriculture
Granulated ferrous sulfate heptahydrate designed for soil amendment to correct iron deficiencies in crops. As a separate chemically defined iron sulphate, it falls under this tariff item, provided it is not formulated as a fertilizer.
Ferrous Sulfate Heptahydrate
Ferrous sulfate heptahydrate (FeSO4·7H2O) is a pale green crystalline compound used primarily as a nutrient supplement in agriculture and water treatment. As a separate chemically defined iron sulphate, it falls under this tariff item.
Iron(III) Sulfate Solution (45% Fe2(SO4)3)
A 45% aqueous solution of iron(III) sulfate used in wastewater treatment and etching. As a solution of a separate chemically defined iron sulphate, it falls under this tariff item if the solution is for safety or transport.
Iron(II) Sulfate Monohydrate
Iron(II) sulfate monohydrate (FeSO4·H2O), also known as melanterite, serves as a reducing agent and iron supplement in animal feed. As a separate chemically defined iron sulphate, it falls under this tariff item.
Mohr'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. As a double salt, Chapter Note 5 directs it to heading 28.42, so it does not belong under this item.
Technical Grade Cobalt Sulfate
Technical grade cobalt sulfate (approx. 20-24% Co) for industrial pigment and battery applications. As a separate chemically defined cobalt sulphate, it falls under this tariff item.