Sodium Molybdate Dihydrate – Properties, Applications, and Benefits

Sodium Molybdate Dihydrate (Na₂MoO₄·2H₂O) is a white, crystalline inorganic compound widely used across industrial, agricultural, and laboratory sectors. As a source of molybdenum — an essential trace element — it plays a key role in catalysis, corrosion inhibition, and micronutrient supplementation.

Chemical Overview

• Chemical Name: Sodium Molybdate Dihydrate

• Chemical Formula: Na₂MoO₄·2H₂O

• Molar Mass: 241.95 g/mol

• Appearance: White crystalline powder

• Solubility: Soluble in water

• CAS Number: 10102-40-6

Key Properties

• Excellent water solubility, making it ideal for aqueous formulations

• Non-volatile and stable under normal storage conditions

• Source of molybdenum, an important element in oxidation-reduction reactions

• Compatible with other fertilizers, corrosion inhibitors, and lab reagents

Applications

Industrial Uses

• Corrosion Inhibitor: Used in cooling towers, closed-loop water systems, and metalworking fluids to protect steel and other metals.

• Catalyst Precursor: Employed in petrochemical and oxidation catalysts.

• Pigments & Ceramics: Functions as a colorant in ceramic glazes and paints.

Agricultural Uses

• Micronutrient Fertilizer: Supplies molybdenum to plants, essential for nitrogen fixation and enzyme activity, especially in legumes.

• Often used in foliar sprays, seed treatments, or soil conditioners.

Laboratory and Research

• Reagent in analytical chemistry and biochemical assays

• Component in molybdate-based test kits for phosphate and other anions

Benefits

• Highly water-soluble – suitable for aqueous delivery systems

• Low toxicity compared to other molybdenum compounds

• Versatile – supports multiple industrial and biological functions

• Stable – long shelf life under standard storage conditions

Storage and Handling

• Store in a cool, dry, and well-ventilated area

• Avoid moisture and contamination to preserve purity

• Use appropriate PPE during handling (gloves, mask, goggles)

Environmental and Safety Considerations

• Generally regarded as low-toxicity when handled properly

• Avoid excessive environmental discharge — can bioaccumulate in aquatic environments

• Follow all local regulations for disposal and handling

Conclusion

Sodium Molybdate Dihydrate is a highly functional and reliable compound, valued for its chemical stability, water solubility, and essential trace element role. Whether you're improving crop yields, preventing corrosion, or conducting lab research, this compound delivers performance and versatility.

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