Hazmat division 2.1 poses what hazard?

• A. Nonflammable Gas
• B. Flammable Gas
• C. Cryogenic Gas
• D. Toxic Gas

Answer: (B)

Division 2.1 identifies flammable gases. This category covers gases that can ignite and burn when they are present as a vapor in air and exposed to an ignition source under normal handling conditions. That’s why the correct answer highlights flammable gas, distinguishing it from nonflammable gases (2.2) and toxic gases (2.3). Cryogenic gases involve extremely low temperatures and their primary hazard isn’t flammability, so they’re not what 2.1 describes. In practice, handling substances in this division requires controlling ignition sources, ensuring good ventilation, bonding and grounding to prevent static sparks, and using equipment and labeling appropriate for flammable gases. Examples include propane, butane, and hydrogen, which form flammable vapors that can ignite in air.