Alums
Sulfates; alums; peroxosulfates (persulfates): > Alums
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified 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.
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.
Soda Alum Granules
Granular sodium aluminum sulfate for fire extinguisher charges and baking. Alum classification under HTS 2833.30.00.00.
Lab Grade Chrome Alum
High-purity chrome alum for laboratory reagents and crystal growing. HTS 2833.30.00.00 as chemically defined alum.
Food-Grade Potassium Alum
FCC-grade potassium alum used as a pickling agent and in water clarification for food processing. Classified as alum in HTS 2833.30.00.00.