Ferrous Sulfate Heptahydrate
Ferrous sulfate heptahydrate, also known as green vitriol, is used as a fertilizer supplement, water treatment agent, and iron source in animal feed. It qualifies under HTS 2833.29.51 as an 'other' sulfate, specifically a metal sulfate not enumerated elsewhere in heading 2833.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in monohydrate form (FeSO4·H2O)
Specific hydration states have dedicated subheadings within 2833, altering the exact classification.
If put up as a fertilizer preparation
Fertilizer mixtures containing mineral/chemical elements fall under Chapter 31, not pure compounds.
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Import Tips & Compliance
• Provide assay certificates showing iron and sulfate content to distinguish from ferrous sulfate monohydrate (2833.25)
• Label as fertilizer grade if applicable, but ensure it meets Chapter 28 purity standards to avoid Chapter 31 reclassification
• Monitor moisture content during shipping to prevent degradation and customs disputes over hydrate form
Related Products under HTS 2833.29.51
Sodium Lauryl Sulfate
Sodium lauryl sulfate (SLS) is an anionic surfactant commonly used in shampoos, soaps, and detergents for its foaming properties. It is classified under HTS 2833.29.51 as a sulfate of an organic base, falling into the 'other sulfates' category of Chapter 28 for chemically defined inorganic compounds.
Manganese Sulfate Monohydrate
Manganese sulfate monohydrate serves as a micronutrient in fertilizers, animal feeds, and agrochemicals. Classified in HTS 2833.29.51 as an other sulfate of a base metal, distinct from listed sulfates like copper or nickel.
Zinc Sulfate Heptahydrate
Zinc sulfate heptahydrate is applied in agriculture as a fungicide, fertilizer, and in water purification. It falls under HTS 2833.29.51 as an unlisted metal sulfate in the 'other sulfates' category.
Magnesium Sulfate Heptahydrate (Epsom Salt)
Pharmaceutical-grade magnesium sulfate heptahydrate, known as Epsom salt, is used for baths, laxatives, and medical applications. HTS 2833.29.51 covers it as an other sulfate, provided it's chemically pure and not a preparation.
Nickel Sulfate Hexahydrate
Nickel sulfate hexahydrate is essential for electroplating baths, catalysts, and battery production. Though nickel sulfates have specific provisions, high-purity forms not matching enumerated subheadings fall under HTS 2833.29.51 as other sulfates.
Cobalt Sulfate Heptahydrate
Cobalt sulfate heptahydrate is used in pigments, catalysts, and lithium-ion battery precursors. It is classified under HTS 2833.29.51 as an other sulfate not specifically provided for elsewhere.