Final answer:
Class 1 involves explosives, Class 2.1 includes flammable gases, and Class 3 consists of flammable liquids. These hazard classifications play a vital role in ensuring the safe handling and transportation of dangerous materials.
Step-by-step explanation:
Certainly! Here are more detailed explanations of each of the hazard classes you've mentioned based on the UN classification system for dangerous goods:
1. **Class 1: Explosives**
- **Description:** Materials and articles that are capable of causing an explosion or a pyrotechnic effect. This class is further divided into divisions based on the type and degree of danger.
- **Examples:** Dynamite, fireworks, ammunition.
2. **Class 2.1: Flammable Gas**
- **Description:** Gases that, at ambient temperature and pressure, can be ignited in the presence of an ignition source. This includes gases that are flammable in air.
- **Examples:** Propane, methane, butane.
3. **Class 3: Flammable Liquids**
- **Description:** Liquids that have a flash point not exceeding 60.5 degrees Celsius (141 degrees Fahrenheit) and can be easily ignited by an external ignition source.
- **Examples:** Gasoline, ethanol, diesel.
These hazard classes are part of the international system used to classify and label chemicals and hazardous materials for transportation.
The classification helps ensure proper handling, storage, and transportation practices to prevent accidents and protect public safety.
The UN classification system is widely adopted globally to facilitate the safe movement of dangerous goods across borders.