Ultrapure cartridge is ideal for a wide range of laboratory and scientific procedures. Designed specifically for nucleonic, electronic, and other applications where water with 1 megohm resistance is of utmost importance. Cartridges produce high water purity levels with mixed-bed ion-exchange resins. A purity of 10 megohms is obtained when using two cartridges in series. This also allows cartridge rotation for obtaining up to 50% more cartridge capacity. Product water is largely free of carbon dioxide and silica. Has a pH between 6.8 and 7.2. Meets CAP specifications for reagent grade water, Type II, when used on most tap water supplies.