Sodium Tungstate
Sodium Tungstate Dihydrate, Tungstic Acid Sodium Salt.
- CAS
- 13472-45-2
- EC
- 236-743-4
- Sectors
- Mining & Metals, Textiles, Leather & Paper
Sodium Tungstate (CAS 13472-45-2) is a high-purity inorganic salt, most commonly supplied as a white crystalline dihydrate solid that is readily soluble in water, and it serves as the primary industrial source of tungsten ions for tungsten metal, heteropolyacid catalysts, textile mordants and metallurgical refining. The compound is highly valued in the Mining and Metallurgy sectors for its role in the conversion of tungsten ores into high-performance alloys. Its high density and consistent chemical properties allow for precise control during the synthesis of specialty chemical reagents and pigments. In biological and agricultural research, it has gained attention as a specialized enzyme inhibitor and as a potential plant growth modifier. Its exceptional water solubility and stability under ambient conditions make it a versatile tool for laboratory analysis and specialized industrial dyeing.
Typical Properties
| Molecular formula | Na.O.W |
|---|---|
| Molecular weight | 183.84 g/mol |
| Appearance | Colorless crystals.Soluble in water; insoluble in alcohol and acids. Noncom- bustible. |
| Form | wire |
| Color | white rhombohedral crystals, crystalline |
| Melting point | 698 °C |
| Boiling point | 5660 °C |
| Density | 4.179 g/cm³ |
| Water solubility | g/100g H2O: 71.5 (0°C), 73.0 (20°C), 97.2 (100°C) [LAN05] |
| GHS signal word | Warning · Irritant / harmful |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Sodium Tungstate
Applications
- Chemical Synthesis: Used as a precursor for the manufacture of phosphotungstic acid and other tungsten-based catalysts for organic oxidation.
- Textile Industry: Functions as a mordant in dyeing and as a fire-proofing agent for cellulose-based fabrics and papers.
- Metallurgical Reagent: Employed in the refining of tungsten ores and in the formulation of high-density electrolytes for plating.
Safety & Risks
Classified as Acute Toxicity (Oral). Harmful if swallowed; ensure use of Nitrile Gloves, Safety Glasses, and avoid dust inhalation. Dispose of as Hazardous Waste.
Packaging
25 kg Fiber Drums, 50 kg Plastic Drums, and 1 kg Reagent Jars.