Sodium Tungstate Dihydrate CAS#10213-10-2
High Solubility: The compound has excellent water solubility (74.2 g/100 mL at 25°C), making it ideal for use in aqueous solutions.
Stable Properties: It remains stable under normal conditions and is resistant to degradation at room temperature, ensuring reliable performance.
Weak Alkalinity: Its aqueous solution exhibits weak alkalinity (pH 9-11.5), making it useful for various acid-base reactions.
Versatile Chemical Reactions: It reacts with strong acids to form tungstic acid precipitates, expanding its potential in chemical applications.
White crystalline powder or colorless to white rhombic crystals, characterized by high solubility in water. At 25℃, its water solubility is approximately 74.2 g/100 mL, and its aqueous solution exhibits weak alkalinity. It is insoluble in ethanol and only slightly soluble in ammonia.
The compound remains stable under normal temperature and pressure conditions; however, when heated, it gradually loses its crystalline water. Additionally, it reacts with strong acids to form a tungstic acid precipitate. These properties make it useful in various chemical applications, especially where controlled solubility and acid-base reactions are important.
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 |
Merck | 14,8698 |
Exposure limits | ACGIH: TWA 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) |
