What type of label indicates a gas that is flammable?

A red label with a flame symbol is used to indicate a gas that is flammable. This color coding is part of the hazardous materials transportation regulations and is designed to quickly communicate the potential hazards associated with the material being transported. The red color is universally associated with fire hazards, ensuring that anyone handling or near the flammable gas recognizes the inherent risks.

The flame symbol further reinforces the warning, making it clear that the gas can ignite easily and pose significant danger. Understanding the color coding through labels is crucial for safety in the transportation and handling of hazardous materials, as it helps ensure that proper precautions are taken to prevent accidents or incidents involving flammable gases.