Demineralized water—also known as deionized (DI) or demi water—is water that has had nearly all dissolved minerals and salts removed. It is used in applications that require extremely low conductivity (as low as 0.055 μS/cm) and minimal ionic content. Demineralized water can be produced using ion exchange resins or advanced technologies like Electrodeionization (EDI), depending on the purity requirements and application.