Birex SE III Surface Disinfectant Concentrate Clinic Pack - 12 x 1 fl oz Packet. Each packet makes 1 gallon of solution. EPA-approved, one-step cleaner and disinfectant effective against a broad-spectrum of pathogens including the highly resistant mycobacterium tuberculosis (TB). List N approved for effective use against COVID-19 and SARS-CoV2 (Delta variant). Complies with OSHA’s Blood Borne Pathogens Standard and CDC guidelines for dental cleaning and disinfection.