The temperature of liquid nitrogen used for cryopreservation is:
Liquid nitrogen provides ultralow storage temperature of -196°C at atmospheric pressure, close to its boiling point. At this temperature, kinetic energy of molecules becomes extremely low, effectively halting all biochemical reactions, enzymatic activity, solute diffusion, and ice recrystallization processes. Cells suspended in DMSO-containing freezing medium enter glassy state preventing further ice growth. Long-term viability preserved for decades to theoretically indefinitely. Mechanical ultra-low freezers at -80°C slow metabolism but do not fully arrest chemical reactions; free radical acc
Ref: ATCC Animal Cell Culture Guide Liquid Nitrogen -196°C arrests metabolism; Freshney Ch.22 Vapor vs liquid phase storage principles.
