What does Hazard Class 2 represent?

HAZARD CLASS 2 is GASES, divided into divisions: Division 2.1 — FLAMMABLE gases (propane, hydrogen, acetylene); Division 2.2 — NON-FLAMMABLE, non-toxic gases (helium, nitrogen, compressed air, oxygen); Division 2.3 — POISONOUS/TOXIC gases (chlorine, certain others — among the most dangerous). CDL hazmat. Gases are often transported under pressure (in cylinders or tanks), adding the hazard of a pressurized container that could rupture/explode (especially if heated). Each division has its own placard. Poison gas (2.3) and flammable gas (2.1) carry significant hazards. Understanding the hazard class system helps drivers recognize and handle the materials safely. Knowing Hazard Class 2 = gases (with its divisions) is commonly tested hazmat knowledge.