Toxic chemical

1. Toxic

or Poisonous substances

Very Toxic  Chemical sign

2. Very Toxic

or Poisonous substances which are more likely to kill 

Flammable  Chemical

3. Flammable

easy to start fire

Highly or Extremely Flammable  Chemical

4. Highly Flammable

Extremely Flammalbe can start fire very quickly 
Explosive

5. Explosive

easy to explode
Oxidizing agent  Chemical

6. Oxidizing

Oxidizing Agent, Oxygen, nitric acid
harmful  Chemical

7. Harmful

danger to the health

irritant  Chemical

8. irritant

sodioum hypochlorite
corrosive  Chemical sign

9. Corrosive

Sulfuric acid

danger for environment

10. Dangerous for the environment

cruide oil