Raritan PURASAN EX Refill Tablets *1 Tub of 6 Tablets [41-135A]PURASAN EX Refill Tablets *1 Tub of 6 Tablets A concentrated chlorinating and brominating agent for use as bactericide and disinfectant in the PURASAN Type 1 Marine Sanitation Device. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.