What is a key reason for using dry ice in shipping?

Using dry ice in shipping is advantageous primarily because it sublimates, which provides consistent cooling. Sublimation is the process where dry ice transitions directly from a solid state to a gas without passing through a liquid phase. This characteristic allows it to maintain a low temperature for extended periods, making it highly effective for preserving perishable items, pharmaceuticals, and specimens that require a stable cold environment.

The ability to sublimate provides a steady cooling source as the dry ice evaporates, preventing items from warming up quickly, which can be crucial during transit. This consistent cooling capability is fundamental to ensuring the integrity and safety of temperature-sensitive products.

While other factors such as cost or availability might play a role in the overall decision to use dry ice, the sublimation property is what makes it particularly reliable for shipping purposes.