What classification is Butane in terms of flammability?

Butane is classified as A3 in terms of flammability. This classification indicates that butane is considered a flammable substance with a flash point below 60 degrees Celsius but above 23 degrees Celsius. This means that under normal atmospheric conditions, butane can ignite easily when exposed to a flame or spark, but it does require a certain level of heat to reach its flash point.

The A3 classification places butane in a specific category within the broader group of flammable materials, allowing for better understanding and management of the risks associated with its use in refrigeration and other applications. Understanding these classifications is vital for safe handling, storage, and usage to prevent accidents related to flammability.