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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in aqueous solution exceeding 30% concentration
Solutions of inorganic tungstates may classify under polyphosphates or similar salts if not purely solid form.
If mixed with organic stabilizers or additives
Additives render it a chemical preparation rather than a chemically defined inorganic salt per Chapter notes.
If classified as a different oxometallic salt
If chemically analyzed as a molybdate or other peroxometallic salt, it shifts to other salts in the same heading group.
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Import Tips & Compliance
• Verify purity and chemical composition via lab analysis to confirm classification as chemically defined tungstate per Chapter 28 notes
• Include Material Safety Data Sheets (MSDS) and certificates of analysis in documentation to avoid reclassification as mixtures
• Ensure proper hazardous material labeling if shipped in quantities exceeding regulatory thresholds for moisture-sensitive compounds
Related Products under HTS 2841.80.00
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.