1. Agrochemicals

• Micronutrient for Plants: Sodium molybdate provides molybdenum, a trace element essential for plant growth and health, especially in nitrogen-fixing crops. 
• Nitrogen Metabolism: Molybdenum is a key component in enzymes that convert nitrate to ammonia, a process vital for protein synthesis and overall plant growth. 
• Legume Support: Sodium molybdate is particularly beneficial for legumes like beans, peas, and alfalfa, as it enhances their ability to fix atmospheric nitrogen through symbiotic bacteria. 
• Fertilizer Application: It's water-soluble, making it easy to apply as a foliar spray or through fertigation (applying fertilizer through irrigation). 
• Hydroponics: Sodium molybdate is also used in hydroponic farming, where plants grow in nutrient solutions instead of soil.

2. Water Treatment

• Corrosion Inhibition: Sodium molybdate is an effective corrosion inhibitor for various metals, especially steel and copper, commonly found in water systems. It works by forming a passive layer on the metal surface, preventing water and oxygen from directly contacting the metal and causing corrosion.

3. Metal Treatment

• Corrosion Inhibition: Sodium molybdate is a non-oxidizing anodic inhibitor. It works by forming a protective layer on the metal surface, which helps to prevent corrosion. This is particularly useful in systems where metals are exposed to moisture, such as in cooling towers, heat exchangers, and boilers. 
• Metalworking Fluids: It's used in metalworking fluids to protect metal parts from corrosion during machining and other processes.

4. Performance Chemicals

• Source of Molybdenum: Sodium molybdate is a readily available and soluble source of molybdenum, making it useful for introducing molybdenum into various chemical compounds and materials.  It's often used as a starting material in the synthesis of other molybdenum compounds, such as molybdenum oxides and other molybdates.