For what reason are Dewar containers specifically used in hazmat situations?

Dewar containers are specifically designed to maintain low temperatures, which is essential when handling materials that require cryogenic storage. These containers utilize a vacuum-insulated design to minimize heat transfer, allowing contents such as liquid nitrogen or helium to be stored safely and effectively without rapid evaporation or temperature increase.

In hazardous materials situations, this characteristic is particularly crucial when working with substances that must remain in a liquid state at very low temperatures to prevent hazardous reactions, maintain stability, or ensure that they function correctly in various applications. Therefore, the ability of Dewar containers to keep materials cold is fundamental for safely managing and storing substances that could otherwise pose significant risks if not properly controlled.