Sodium Molybdate Dihydrate CAS#10102-40-6
High Water Solubility – White crystalline powder or colorless crystals dissolve effectively in water, with a solubility of about 39 g/100 mL at 25°C.
Mild Alkalinity – The aqueous solution is weakly alkaline, with a pH of approximately 9–10, suitable for various chemical applications.
Thermal Stability – Stable at room temperature, retaining its crystalline structure under normal conditions.
Chemical Reactivity – Reacts with strong acids to form molybdic acid (H₂MoO₄) and can transform into anhydrous sodium molybdate (Na₂MoO₄) upon heating above 100°C, enabling diverse industrial and chemical uses.
Products Description of Sodium Molybdate Dihydrate CAS#10102-40-6
Sodium molybdate dihydrate appears as a white crystalline powder or colorless crystals and is highly soluble in water, with a solubility of approximately 39 g/100 mL at 25°C. Its aqueous solution is weakly alkaline, with a pH around 9–10. The compound is stable at room temperature. When heated above 100°C, it gradually loses its crystalline water to form anhydrous sodium molybdate (Na₂MoO₄, CAS#7631-95-0). It reacts with strong acids to produce a precipitate of molybdic acid (H₂MoO₄).
Parameters
| Melting point | 100 °C (dec.)(lit.) |
| bulk density | 1000-1400kg/m3 |
| density | 2.37 g/mL at 25 °C |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 840g/l |
| form | Solid |
| Specific Gravity | 3.28 |
| color | White |
| PH | 9-10 (840g/l, H2O, 20℃) |
| Water Solubility | 56 g/100 mL (O ºC) |
| Merck | 148,645 |
| Exposure limits | ACGIH: TWA 0.5 mg/m3 |
| NIOSH: IDLH 1000 mg/m3 | |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| CAS DataBase Reference | 10102-40-6(CAS DataBase Reference) |
| EPA Substance Registry System | Sodium molybdate(VI) dihydrate (10102-40-6) |
| Hazard Codes | Xi,Xn |
| Risk Statements | 36/37/38-20/21/22 |
| Safety Statements | 24/25-36-26 |
| WGK Germany | 1 |
| RTECS | QA5085000 |
| TSCA | Yes |
| HS Code | 28417000 |
| Toxicity | LD50 orally in Rabbit: 4233 mg/kg LD50 dermal Rat > 2000 mg/kg |
Product Application of Sodium Molybdate Dihydrate CAS#10102-40-6
Sodium molybdate dihydrate (CAS#10102-40-6) has a wide range of applications. In industry, it is used as a corrosion inhibitor for circulating water, a metal phosphating treatment agent, and a chemical catalyst. In the pharmaceutical sector, it serves as an intermediate and as a reagent for enzyme research. In the electronics industry, it is applied in the production of components such as semiconductor films. In analytical chemistry, it functions as a chromogenic agent for the detection of heavy metal ions. During storage and handling, it should be kept in a sealed container to prevent contact with strong acids, and proper protective measures should be observed.
