Straight Plug Stopper Wheaton's new Ultra Pure straight plug stoppers are made from a bromobutyl rubber compound containing the highest level of chemical purity. These stoppers are Water for Injection (WFI) compatible. They also have an ultra low level of extractables and they remain stable when exposed to gamma irradiation making them very well suited for Ready-for-Sterilization and Ready-for-Use applications. Lyophilization Stopper Wheaton's new Ultra Pure lyophilization stoppers are made from a bromobutyl rubber compound containing the highest level of chemical purity. These stoppers demonstrate a very low level of moisture absorption and a low level of extractables. They are compatible with Water for Injection (WFI) applications and are not suitable for packaging application. They are free from natural rubber or natural rubber latex. They are ideal for use in most lyophilization applications.
