Ferrous Sulfate Heptahydrate Granules
Ferrous sulfate heptahydrate (FeSO4·7H2O) granules serve as an iron supplement in water treatment and animal nutrition, under HTS 2833.29.51.90 for other sulfates. Excluded from Chapter 31 as a pure chemically defined compound.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ferrous sulfate specifically enumerated
Some iron sulfates have dedicated subheadings separate from 'other'.
If when incorporated into complete animal feeds
Feed preparations containing ferrous sulfate fall under Chapter 23.
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Import Tips & Compliance
• Monitor oxidation state with fresh lot testing to prevent classification disputes
• Use anti-caking agents only if not affecting chemical purity declaration
• Provide water solubility test results for end-use verification
Related Products under HTS 2833.29.51.90
Sodium Lauryl Sulfate Powder
Sodium lauryl sulfate (SLS) is an anionic surfactant classified as a sulfate of sodium under HTS 2833.29.51.90 due to its chemical structure featuring a sulfate group bonded to a lauryl chain. It is widely used in shampoos, soaps, and detergents for its foaming and cleansing properties.
Zinc Sulfate Heptahydrate Crystals
Zinc sulfate heptahydrate (ZnSO4·7H2O) is a colorless crystalline sulfate salt used in fertilizers and animal feed supplements, classified under HTS 2833.29.51.90 as an 'other' sulfate. Its chemical definition as a metal sulfate places it distinctly in Chapter 28.
Manganese Sulfate Monohydrate Powder
Manganese sulfate monohydrate (MnSO4·H2O) is a pale pink powder used as a micronutrient in fertilizers and batteries, falling under HTS 2833.29.51.90 for other sulfates. It qualifies as a chemically defined inorganic metal sulfate per Chapter 28 notes.
Copper Sulfate Pentahydrate Crystals
Copper sulfate pentahydrate (CuSO4·5H2O), known as blue vitriol, is used in agriculture as a fungicide and in electroplating, classified in HTS 2833.29.51.90 as other sulfates. Its defined chemical structure as a copper salt confirms Chapter 28 placement.
Nickel Sulfate Hexahydrate Solution
Nickel sulfate hexahydrate (NiSO4·6H2O) in aqueous solution is used in electroplating and catalyst production, classified under HTS 2833.29.51.90 as other sulfates. Remains in Chapter 28 despite solution form if chemically defined.
Ammonium Persulfate Crystals
Ammonium persulfate ((NH4)2S2O8) is a white crystalline oxidizer used in polymerization and etching, under HTS 2833.29.51.90 as other peroxosulfates not elsewhere specified. Chapter notes confirm classification for ammonium peroxysalts.