What Is a Sterile Reactor? Validation, Design & Applications Answering the core question: What is a sterile reactor, and how does it maintain a contamination-free environment for aseptic production? A sterile reactor is a vessel validated to keep bioburden below 1 CFU/100 mL through sterilize-in-place (SIP) at 121-134 degree C for 15-30 min and clean-in-place (CIP) cycles. Aseptic mechanical seals, sterile 0.2 micrometer vent and feed filters, and an inert barrier prevent