Definition:Cryogenic liquid at -196°C, used for ultra-low temperature applications and rapid freezing.
Applications::
- Cryogenic freezing (IQF products, high-value items)
- Biological specimen transport
- Ultra-low temperature storage
- Emergency cooling
- Extremely rapid freezing (seconds to minutes)
- Excellent product quality (smallest ice crystals)
- No mechanical equipment required (passive)
- High cost (R15-40 per liter depending on volume)
- Requires specialized insulated containers (dewars)
- Asphyxiation hazard (displaces oxygen)
- Cold burn hazard (extreme cold)
- Nitrogen evaporation losses
Advantages::
Disadvantages::
Safety:: Requires ventilation, protective equipment, proper handling procedures
Related Terms:: Cryogenic, Dry Ice, Rapid Freezing, Dewar Flask