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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.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China1.6%+35.0%36.6%
🇲🇽Mexico1.6%+10.0%11.6%
🇨🇦Canada1.6%+10.0%11.6%
🇩🇪Germany1.6%+10.0%11.6%
🇯🇵Japan1.6%+10.0%11.6%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2833.22.00.00Lower: 35% vs 36.6%

If aluminum sulfate without potassium

Pure aluminum sulfate lacks the double salt structure of alums, falling under single metal sulfates.

2842.10.00.00Higher: 38.7% vs 36.6%

If classified as a complex salt

Double salts may shift to complex salts heading if not specifically alums.

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Import Tips & Compliance

• Verify purity and chemical composition via lab analysis to confirm 'alum' status; ensure SDS includes CAS number 10043-67-1

• Watch for misclassification as single sulfates

Related Products under HTS 2833.30.00.00

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.

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.