146 - Lyophilization/Freeze-Drying, Filling, Sublimation, Disorption, Backfilling, Stoppers, Vacuum and Water's Triple Point with David Simoens

What this episode covers

David Simoens, founder of Life Science Professionals, explains the lyophilization (freeze-drying) process for pharmaceutical products, detailing the transition from liquid to solid state via sublimation and desorption. He distinguishes between liquid-filled and lyo-filled vials, highlighting the specific use of specialized stoppers (like igloo or multi-legged designs) that allow solvent escape during drying. The discussion covers the technical parameters of the freeze-dryer cycle, including freezing, primary drying at the triple point of water, secondary drying, and backfilling with nitrogen to ensure product stability.