Ammonium Alum Powder
Ammonium aluminum sulfate (NH4Al(SO4)2·12H2O) is a powdered alum used in flameproofing textiles and baking powder production. Classified in HTS 2833.30.00.00 as an alum due to its double sulfate composition.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If nickel-free ammonium sulfate
Single ammonium sulfates go under specific sulfates, not alums.
If impure and used as fertilizer
Fertilizer-grade versions fall under chapter 31 per exclusions.
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 certificate of analysis showing double salt formation; label clearly to avoid confusion with fertilizers
• Comply with REACH if destined for EU
Related Products under HTS 2833.30.00.00
Potassium Alum Crystals
Potassium alum (potassium aluminum sulfate, KAl(SO4)2·12H2O) is a double salt used in water purification, leather tanning, and as a styptic agent. It falls under HTS 2833.30.00.00 as it is a classic alum, a hydrated double sulfate of a monovalent cation and trivalent aluminum.
Sodium Aluminum Sulfate Hydrate
Sodium alum (NaAl(SO4)2·12H2O), also known as soda alum, is used in paper manufacturing and as a food additive (SAS). It is classified under HTS 2833.30.00.00 for its alum structure as a double sulfate.
Chrome Alum Crystals
Chrome alum (chromium potassium sulfate, KCr(SO4)2·12H2O) is used in leather tanning and analytical chemistry. Falls under HTS 2833.30.00.00 as a trivalent metal alum double salt.
Ferric Ammonium Alum
Ferric ammonium alum (NH4Fe(SO4)2·12H2O) serves as a coagulant in water treatment and mordant in dyeing. HTS 2833.30.00.00 covers it as an iron-based alum.
Technical Grade Potassium Alum
Technical grade potassium aluminum sulfate for industrial decolorizing and sizing in textiles. Classified in HTS 2833.30.00.00 as a standard alum.
Pharmaceutical Grade Ammonium Alum
USP-grade ammonium alum used in topical astringents and pharmaceuticals. HTS 2833.30.00.00 due to its chemically defined alum nature.