Sodium Molybdate
Disodium Molybdate
- CAS
- 7631-95-0
- EC
- 231-551-7
- Sectors
- Water & Wastewater Treatment, Agriculture, Lubricants & Metalworking
Sodium Molybdate (CAS 7631-95-0) is an inorganic molybdenum salt, typically supplied as the dihydrate, that appears as a white crystalline powder, dissolves readily in water, and is used in fertilizers for molybdenum deficiency, as a corrosion inhibitor, in catalysts and battery electrode materials, and in water treatment systems. Density 2.7 g/cm³, melting point 687°C (anhydrous); highly soluble in water (840 g/L at 20°C), insoluble in organics. Hygroscopic, pH 9-10 in solution; produced by dissolving molybdenum trioxide in sodium hydroxide.
Typical Properties
| Molecular formula | MoO4.2Na |
|---|---|
| Molecular weight | 205.92 g/mol |
| Appearance | solid |
| Form | Powder |
| Color | White |
| Odor | odorless |
| Melting point | 689 °C |
| Density | 3.78 g/mL at 25 °C |
| Water solubility | It is soluble in water. |
| GHS signal word | Danger · Acute toxicity, Irritant / harmful, Health hazard |
| 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 Molybdate
Applications
Used in fertilizers for molybdenum deficiency, corrosion inhibitors, catalysts, electrode materials in batteries, and in water treatment systems.
Safety & Risks
Moderate toxicity; irritates eyes and skin, inhalation risk low. Avoid ingestion; use PPE. Non-flammable but incompatible with strong reducers.
Packaging
In 25kg bags or drums with polyethylene liners; rinse for recycling or puncture for disposal in landfills per guidelines.