Ultrapure water is a water that has been purified for stringent specifications. Ultrapure water is a term commonly used in manufacturing to emphasize the fact that the water is treated to the highest levels of purity for all contaminant types, including organic and inorganic compounds; dissolved and particulate matter; volatile and non-volatile; reactive, and inert; hydrophilic and hydrophobic; and dissolved gases. It is widely used as a raw material, ingredient, and solvent in the processing, formulation, and manufacture of pharmaceutical products, active pharmaceutical ingredients (APIs) and intermediates, and analytical reagents.
The ultrapure water process begins with pretreatment, typically through ultrafiltration, 2 pass reverse osmosis water filter, UV purification, before employing a deionizing water system of ion exchange or electro-deionization (EDI).