Cryogenic materials, like liquid nitrogen (LN2) are stored at extremely low temperatures, requiring specialised containers to prevent the creation of a potentially unsafe environment.

Such liquids boil rapidly when exposed to heat ingress, whether through improper insulation, conductive materials, or other circumstances. When this occurs, the liquid expands to a very large volume of gas, which could create an oxygen deficient and life-threatening situation.

The extreme cold can also damage materials that are not specifically designed to suit cryogenic temperatures. This could cause an uncontrolled release and an unsafe situation. To reduce risk in supply, cryogenic equipment (such as purpose-built open neck dewars) must be used to handle such substances.

Secure it.

Ensure liquid nitrogen is stored and labelled correctly in an appropriate container.

Ventilate it.

Always ensure that adequate ventilation is provided in areas where dewars are filled, used, stored or transported.

Respect it.

There are several potential hazards when filling, handling and storing liquid nitrogen. Ensure you transport in an appropriate vehicle and wear suitable protective clothing when handling and decanting.