Sodium Molybdate (CAS: 7631-95-0)

Sodium Molybdate

Physical & Chemical Properties

Appearance & Form: White crystalline powder or shining crystal flakes; odorless.

Solubility: Highly soluble in water, forming a clear, colorless to faint yellow solution; practically insoluble in ethanol.

Assay (Sodium Molybdate, Na2MoO4): Not less than 99.0% min (anhydrous or dihydrate basis).

pH Value: Typically 7.0 to 10.5 (5% aqueous solution).

Melting Point: Approximately 687°C (anhydrous).

Quality & Safety Standards

Molybdenum Content (Mo): Typically ≥ 39.0% min (for dihydrate) or ≥ 46.5% min (for anhydrous).

Chloride (Cl) & Sulfate (SO4): Strict impurity limits, typically max 0.02% to 0.05% each.

Heavy Metals (as Pb): Not more than 10 to 20 ppm max.

Safety & Handling: Low toxicity compared to other heavy metal salts, but can cause eye and respiratory irritation upon dust contact. Use standard protective gear such as safety goggles, gloves, and a dust mask during handling.

Recommended Applications

Water Treatment & Corrosion Inhibitors: Widely utilized as a cathodic corrosion inhibitor in industrial cooling water systems, boiler water treatment, and metalworking fluids.

Agriculture & Fertilizers: Used as an essential micro-nutrient source of molybdenum in agricultural fertilizers to prevent whip-tail in crops and correct soil deficiencies.

Chemical Synthesis & Catalysts: Employed as a chemical intermediate and catalyst precursor for manufacturing other molybdenum compounds, pigments, and dyes.

Metal Finishing: Used in electroplating and metal surface treatments for corrosion protection.