Aluminates
Salts of oxometallic or peroxometallic acids: > Other: > Aluminates
Duty Rate (from China)
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)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2841.90.40.00
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.
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.
Zinc Aluminate Catalyst
Zinc aluminate (ZnAl2O4) supported catalyst for dehydrogenation reactions in petrochemicals. HTS 2841.90.40.00 as aluminate, excluding prepared catalysts only if >50% carrier (3815). Supplied as extruded pellets.
Cerium-Doped Yttrium Aluminate
Yttrium aluminum garnet (Y3Al5O12:Ce) phosphor powder for LED lighting and scintillators. As chemically defined aluminate under HTS 2841.90.40.00, doped variants remain here unless luminophore prepared (3206). Green-emitting nanoparticles.
Sodium Aluminate Flakes
Anhydrous sodium aluminate in flake form for zeolite synthesis and alumina extraction. HTS 2841.90.40.00 as aluminate salt, preferred over solution for long-distance shipping. 99% purity, low chloride content.
Aluminum Sodium Oxide (Beta-Alumina)
Beta-alumina (NaAl11O17) solid electrolyte powder for sodium-sulfur batteries. Pure aluminate structure qualifies for HTS 2841.90.40.00 as oxometallic salt. High ionic conductivity material.
Lanthanum Aluminate Substrate
Lanthanum aluminate (LaAlO3) single crystal substrates for epitaxial thin-film growth in superconductors. Unworked crystals under HTS 2841.90.40.00 per notes on doped elements. 2-inch diameter wafers.
Iron Aluminate Pigment
Synthetic iron aluminate (FeAl2O4) spinel pigment for ceramic glazes, providing blue-black color. Chemically defined aluminate for HTS 2841.90.40.00, before pigment preparation. Micronized powder.
Cobalt Aluminate Blue
Cobalt aluminate (CoAl2O4) high-temperature stable blue pigment powder for ceramics and glass coloring. As pure aluminate salt under HTS 2841.90.40.00. Calcined at 1200°C.
Mixed Rare Earth Aluminate
Mixed rare earth aluminate (e.g., (Gd,Y)3Al5O12) garnet powder for phosphors and lasers. HTS 2841.90.40.00 for aluminates unless rare earth dominant. Laser-grade purity.