What does Hazard Class 1 represent?

HAZARD CLASS 1 is EXPLOSIVES — materials that can rapidly release gas and heat (detonate or deflagrate), such as dynamite, ammunition, fireworks, and blasting agents. CDL hazmat. Class 1 is divided into DIVISIONS (1.1 through 1.6) based on the type/degree of explosive hazard (1.1 = mass explosion hazard, the most dangerous). Explosives have the strictest transport requirements: special routing, attendance, no smoking nearby, compatible loading, and security. Class A/B explosives generally cannot be transported on buses with passengers. The explosive placard is orange. Knowing Hazard Class 1 = explosives (and that it's the most strictly regulated) is part of the hazard class system commonly tested on the hazmat exam.