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.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If phosphonate contamination
Admixtures of phosphates reclassify under heading 2835.
If complex with phosphides
Phosphide complexes fall under 2853 per chapter note 7.
If US goods returned after processing
Reimported US-origin chemicals qualify for duty-free under 9802.
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Import Tips & Compliance
• Distinguish anhydrous vs dihydrate forms with water content certificates (<0.5%)
• Lab-grade requires USP/ACS compliance docs for pharma-related imports
• Avoid bulk packaging over 25kg to minimize DOT hazardous classification
Related Products 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.
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.