| A | B |
| Biohazard | Infectious material with the potential to cause disease or infection. |
| Caution | Used for less hazardous materials. |
| Compressed Gas | This gas is under very high pressure inside of its container, and may explode easily. |
| Corrosive | These materials are acid-like and will eat away or dissolve things. |
| Dangerous to the Environment | These materials can kill or injure nature. |
| Explosive | These materials are likely to cause a sudden, loud and violent release of energy. |
| Flammable | These materials are able to catch fire easily. |
| Longer Term Health Hazard | These materials may cause cancer or damage to organs. |
| Oxidizer | These materials serve as the source of oxygen for a reaction. |
| Radioactive | Process in which some isotopes break down into other isotopes and particles. |
| Reactive | These materials are likely to undergo a chemical change. |
| Toxic | These materials are poisonous or deadly. |