Formulations containing molybdate are used as corrosion inhibitors in industrial water treatment. In particular molybdate finds application in closed recirculating systems such as water heating systems and chilled water systems. Since molybdates are widely used in water treatment and industrial processes testing molybdate is becoming increasingly important for effluents and industrial discharges. This AE309 – MOLYBDATE TEST KIT is a colour comparison one and can give accurate results in time.