Synonyms of Deionized Water include Demineralised Water, DI Water, Purified Water and De-ionised Water. Deionised Water is the most commonly used Purified Water. Used in laboratory testing, critical cleaning, laser cutting, automotive, cosmetics, food processing and many more. To produce Deinoised Water, potable water is put through reverse Osmosis removing organic matter. The water then passes through a twin bed Deionizer removing Cat ions from Sodium, Calcium, Iron and Copper then An ions such as Chloride and Sulphate.The maximum level of impurities is now typically 1 ms. Finally the water is passed through UV sterilization and then a 0.2 micron filter, this water is now high quality Deionized Water. Pure Klenz Water is batch tested by a leading UKAS accredited laboratory to ensure product quality. Certificates of analysis are available on request.