Sodium molybdate is a chemical compound with the formula Na₂MoO₄. This inorganic salt is an essential component in various industries and applications, ranging from fertilizers to corrosion inhibitors. Its unique properties and its role in different sectors have made it an important compound in the chemical industry.

Sodium molybdate is a white crystalline powder that is highly soluble in water. It forms a dihydrate compound (Na₂MoO₄.2H₂O) when left in a moist environment. Its molar mass is approximately 241.94 g/mol for the anhydrous form and 281.92 g/mol for the dihydrate form. It has a high melting point of about 687°C, and it decomposes before boiling.

Uses of Sodium Molybdate

Corrosion inhibition: Sodium molybdate is widely used in industrial cooling systems and automotive antifreeze solutions as a corrosion inhibitor. It protects metals from corrosion by forming a passivation layer on the metal surface.

Agricultural applications: Sodium molybdate is used in fertilizers as a source of molybdenum. Molybdenum is an essential micronutrient for plants, as it plays a critical role in various enzymatic reactions.

Industrial applications: It is used in the production of pigments, inks, and dyes, owing to its color-altering properties. Moreover, it is also employed in the metal finishing industry for enhancing the adhesion and corrosion resistance of metal surfaces.