What is a common characteristic of self-oxidizing materials in a fire?

Self-oxidizing materials are characterized by their ability to ignite spontaneously without the need for an external ignition source. This trait is due to their chemical composition, which allows them to react with atmospheric oxygen at room temperature, generating enough heat to ignite the material itself. This phenomenon is particularly important for fire safety, as these materials can pose significant risks in storage and handling. Understanding this characteristic helps individuals working in security and safety fields recognize potential fire hazards and respond appropriately to prevent fires from occurring.

The other aspects mentioned in the options, while related to fire behavior in general, do not accurately describe self-oxidizing materials. Ignition does not depend on external sources, nor is there a requirement for extremely low combustion temperatures or the immediate production of toxic gases specifically associated with self-oxidizers.