HyPure™ WFI and Purified Waters Water is one of the major components used by the pharmaceutical industry, widely used as a cleaning or rinsing agent, as an excipient in media and buffer preparation, and in reconstitution of products in both therapeutic and diagnostic applications. Furthermore, there are various applications for uniquely qualified types of water. For example, in cell culture applications, the water used must be free of contaminating endotoxin. It is crucial in many molecular biology applications that water be free of nucleases (i.e., DNase and RNase) and proteases. To meet these exacting requirements, HyClone offers the following line of HyPure water products: