Sodium Tungstate Dihydrate CAS#10213-10-2
Excellent Water Solubility – Highly soluble in water (about 74.2 g/100 mL at 25°C), allowing for easy dissolution and efficient use in aqueous systems.
Stable Under Normal Conditions – Remains stable at ambient temperature and pressure, ensuring reliable storage and handling performance.
Mild Alkalinity for Versatile Applications – Forms a weakly alkaline aqueous solution, making it suitable for applications requiring controlled pH conditions.
Predictable Chemical Reactivity – Reacts selectively with strong acids to form tungstic acid precipitates, enabling controlled chemical processing and purification steps.
Products Description of Sodium Tungstate Dihydrate CAS#10213-10-2
Sodium tungstate dihydrate appears as a white crystalline powder or colorless to white rhombic crystals and is highly soluble in water. At 25°C, its solubility in water is approximately 74.2 g/100 mL, and the resulting aqueous solution is weakly alkaline. It is insoluble in ethanol and only slightly soluble in ammonia. The compound is stable under normal temperature and pressure, but gradually loses its crystalline water when heated. It reacts with strong acids to form tungstic acid precipitates.
Parameters
| Melting point | 698 °C(lit.) |
| bulk density | 1600kg/m3 |
| density | 4.18 |
| storage temp. | Store at +15°C to +25°C. |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Solid |
| color | White to slightly yellow |
| Specific Gravity | 3.25 |
| Odor | Odorless |
| PH | 9.5-11.5 (25℃, 1M in H2O) |
| PH Range | 9 - 11.5 at 100 g/l at 20 °C |
| Water Solubility | 730 g/L (20 ºC) |
| λmax | λ: 260 nm Amax: ≤0.120 |
| λ: 280 nm Amax: ≤0.035 | |
| Merck | 148,698 |
| Exposure limits | ACGIH: TWA 3 mg/m3 |
| NIOSH: TWA 1 mg/m3; STEL 3 mg/m3 | |
| InChIKey | WPZFLQRLSGVIAA-UHFFFAOYSA-N |
| CAS DataBase Reference | 10213-10-2(CAS DataBase Reference) |
| EPA Substance Registry System | Tungstate (WO42-), disodium, dihydrate, (T-4)- (10213-10-2) |
Safety Information
Hazard Codes Xn Risk Statements 22-36/38-36 Safety Statements 36-37/39-26-39 WGK Germany 1 RTECS YO7900000 TSCA Yes HS Code 28418000 Toxicity LD50 (mg tungstate/kg) in rabbits: 105 i.m.; in rats: 240 s.c. (Venugopal, Luckey)
| Hazard Codes | Xn |
| Risk Statements | 22-36/38-36 |
| Safety Statements | 36-37/39-26-39 |
| WGK Germany | 1 |
| RTECS | YO7900000 |
| TSCA | Yes |
| HS Code | 28418000 |
| Toxicity | LD50 (mg tungstate/kg) in rabbits: 105 i.m.; in rats: 240 s.c. (Venugopal, Luckey) |
Product Application of Sodium Tungstate Dihydrate CAS#10213-10-2
Sodium tungstate dihydrate (CAS#10213-10-2) has a wide range of applications. In industry, it is used for steel electroplating, surface treatment, and petrochemical catalysis. In materials science, it serves as a key raw material for the production of tungsten trioxide, tungsten carbide, and related compounds. It is also employed as a reagent for detecting various elements in chemical analysis. In the pharmaceutical industry, it is involved in drug synthesis and enzyme inhibitor research, and in agriculture, it can be used as a trace element fertilizer.
