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. Classified under HTS 2833.29.20.00 as an other sulfate of iron, meeting Chapter 28 criteria for chemically defined inorganic iron compounds.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in solution or peroxysulfate form
Peroxosulfates or dissolved forms may shift to other inorganic acid salts headings.
If when used as pesticide active ingredient
Herbicides or pesticides containing iron sulfates classify under Chapter 38.
If as complex double salts with other metals
Double salts of sulfates fall under 2842 per Chapter notes.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide chemical assay certificates confirming Fe2(SO4)3 composition to prevent reclassification
• Label as hazardous material if moisture-sensitive to meet DOT import transport regulations
• Avoid packaging that suggests retail sale, as bulk industrial forms stay in Chapter 28
Related Products under HTS 2833.29.20.00
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. It falls under HTS 2833.29.20.00 as a sulfate of iron, specifically classified among other iron sulfates due to its chemical definition as an inorganic iron salt.
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. It is classified under HTS 2833.29.20.00 for iron sulfates, excluding those specified elsewhere in the chapter.
Ferric Ammonium Sulfate
Ferric ammonium sulfate ((NH4)Fe(SO4)2·12H2O) is used in analytical chemistry and as a mordant in dyeing. It qualifies under HTS 2833.29.20.00 as a sulfate of iron, treated as a metal salt per Chapter 28 notes on complex salts.
Copperas Crystals (Ferrous Sulfate)
Copperas, or green vitriol, refers to large crystals of ferrous sulfate heptahydrate used in gardening and pigment production. Classified in HTS 2833.29.20.00 as other sulfates of iron, distinct from alums.
Iron(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 HTS 2833.29.20.00 when chemically defined as iron sulfate concentrate.
Ferrous Sulfate Granules for Agriculture
Granulated ferrous sulfate heptahydrate designed for soil amendment to correct iron deficiencies in crops. Falls under HTS 2833.29.20.00 as a pure iron sulfate, not yet a formulated fertilizer.