What is the primary hazard of materials in Class 2?

The primary hazard of materials in Class 2 is gas, as this classification specifically pertains to gaseous materials that may pose risks. Class 2 materials include compressed gases, liquefied gases, and gases that can create a hazard due to their flammable or toxic characteristics. When these gases are released, they can lead to significant safety concerns, including suffocation from lack of oxygen or exposure to toxins.

In contrast, the other categories—flammability, corrosiveness, and radiation—represent different types of hazards associated with various substances but do not encompass the primary focus of Class 2 materials, which is the gaseous state. Understanding the specific hazards associated with Classifications can be critical for training and safety protocols when dealing with hazardous materials.