Tungstates (wolframates)
Salts of oxometallic or peroxometallic acids: > Tungstates (wolframates)
Duty Rate (from China)
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
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 2841.80.00
Sodium Tungstate Dihydrate
Sodium tungstate dihydrate (Na2WO4·2H2O) is a white crystalline salt derived from tungstic acid, classified under HTS 2841.80.00 as a tungstate of an inorganic base. It is commonly used in the production of tungsten metal, fireproofing textiles, and as a catalyst in chemical processes.
Ammonium Tungstate Powder
Ammonium tungstate ((NH4)10W12O41·5H2O) is an ammonium salt of tungstic acid, falling under HTS 2841.80.00 for tungstates. It serves as a precursor in tungsten carbide production for cutting tools and as a source of tungsten in pigments.
Potassium Tungstate Crystals
Potassium tungstate (K2WO4) consists of large colorless crystals used in X-ray fluorescence standards and glass manufacturing. It is classified in HTS 2841.80.00 as a tungstate salt of an alkali metal base.
Calcium Tungstate Powder
Calcium tungstate (CaWO4) powder is a scintillator material used in medical imaging detectors, classified under HTS 2841.80.00 as an alkaline earth tungstate. Its high density makes it ideal for radiation detection.
Disodium Tungstate Anhydrous
Disodium tungstate anhydrous (Na2WO4) is a high-purity reagent for laboratory use in protein crystallization and corrosion inhibition. HTS 2841.80.00 covers this alkali metal tungstate salt.
Magnesium Tungstate Luminescent Grade
Magnesium tungstate (MgWO4) of luminescent grade is used in fluorescent screens and lamps, classified as a tungstate under HTS 2841.80.00. It emits blue light under electron excitation.
Lithium Tungstate Solution Precursor
Lithium tungstate (Li2WO4) in powdered form serves as a precursor for solid-state electrolytes in batteries, under HTS 2841.80.00 for tungstates. It offers high ionic conductivity.
Barium Tungstate Precipitate
Barium tungstate (BaWO4) precipitate is used in X-ray contrast media and as a white pigment, classified in HTS 2841.80.00. Its insolubility provides stable opacity.
Strontium Tungstate Fine Powder
Strontium tungstate (SrWO4) fine powder functions in laser host materials and phosphors, under HTS 2841.80.00. It supports efficient energy transfer in optical applications.
Zinc Tungstate Diagnostic Grade
Zinc tungstate (ZnWO4) diagnostic grade is employed in CT scanner scintillators, classified under HTS 2841.80.00 as a tungstate salt. It offers fast decay time for imaging.
Cerium Tungstate Catalyst
Cerium tungstate (Ce2(WO4)3) serves as a heterogeneous catalyst in oxidation reactions, under HTS 2841.80.00. Its structure provides high surface area for industrial catalysis.
Sodium Paratungstate Pentahydrate
Sodium paratungstate pentahydrate (Na10W12O42·5H2O) is an isopolyoxotungstate used in metal finishing, classified in HTS 2841.80.00. It forms protective conversion coatings.
Ammonium Metatungstate Granules
Ammonium metatungstate granules ((NH4)6H2W12O40) are spray-dried for uniform tungsten powder production, under HTS 2841.80.00. Ideal for thermal spraying applications.
Phosphotungstic Acid Sodium Salt
Sodium phosphotungstate (Na3PW12O40) is used in analytical chemistry for protein precipitation, classified as a tungstate under HTS 2841.80.00 despite phosphate group.
Silicotungstic Acid Hydrate
Silicotungstic acid hydrate (H4SiW12O40·xH2O) functions as a catalyst in esterification, under HTS 2841.80.00 for its tungstate core structure. Green acid catalyst.