Sodium Aluminate Powder
Sodium aluminate (NaAlO2) is a water-soluble inorganic salt derived from aluminum oxide, used primarily in water treatment to adjust pH and remove impurities. It falls under HTS 2841.90.40.00 as an aluminate, which are salts of oxometallic acids of aluminum per Chapter 28 notes. This chemically defined compound is supplied as a fine white powder for industrial applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sold as artificial zeolite for purification
Aluminosilicates classified as zeolites fall under heading 2818, not pure aluminates.
If for retail packaging as aluminum hydroxide mixture
If blended or presented as hydroxide rather than pure aluminate salt, it shifts to aluminum oxide/hydroxide heading.
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Import Tips & Compliance
• Verify purity certificate to confirm it's chemically defined per Chapter 28 Note 1; ensure SDS includes CAS 1302-42-7
• Common pitfall: mislabeling as zeolite (may shift to 2827)
• Obtain EPA registration if for water treatment use
Related Products under HTS 2841.90.40.00
Potassium Aluminate Solution
Potassium aluminate (KAlO2) is an alkaline solution used in paper manufacturing to precipitate silica and improve retention. Classified under HTS 2841.90.40.00 as an aluminate salt of oxoacid of aluminum, meeting Chapter 28 definitions for inorganic metal salts. Typically imported in liquid form at 40-50% concentration.
Calcium Aluminate Cement
Calcium aluminate cement, primarily 11CaO·7Al2O3 and 12CaO·7Al2O3 phases, is a hydraulic binder for high-temperature refractory applications. It qualifies as aluminates under HTS 2841.90.40.00 as salts of peroxometallic acids of aluminum. Supplied as fine powder for casting refractory linings.
Strontium Aluminate Phosphor
Strontium aluminate (SrAl2O4:Eu,Dy) doped with europium and dysprosium is a long-persistence luminescent powder for glow-in-the-dark paints. Classified in HTS 2841.90.40.00 as chemically defined aluminate per Chapter 28 notes, excluding luminophores only if organic (3206). Used in safety signage.
Barium Aluminate Crystals
Synthetic barium aluminate (BaAl2O4) single crystals grown via Czochralski method for laser host materials and scintillators. Falls under HTS 2841.90.40.00 as aluminate salts, provided unworked per Chapter notes (not optical elements 9001). Imported as cylindrical boules.
Lithium Aluminate Powder
Lithium aluminate (LiAlO2) fine powder used as solid electrolyte in lithium-ion batteries and breeder blankets in fusion reactors. HTS 2841.90.40.00 covers it as an aluminate salt of oxometallic acid, chemically defined inorganic compound. High purity grade >99.5%.
Magnesium Aluminate Spinel
Synthetic magnesium aluminate spinel (MgAl2O4) powder or granules for transparent ceramics in armor and windows. Classified as aluminates under HTS 2841.90.40.00, as inorganic salts meeting Chapter 28 criteria before sintering. Purity 99.9%, particle size <1 micron.