Class 8 Hazards

Class 8 Hazards

are corrosive substances which can be in liquids or solids form.  They can when they come in contact with human skin cause irreversible damage

Corrosive Materials:

A corrosive material when comes into contact with other material it will damage or destroy by means of a chemical reaction. Corrosives act either directly, by chemically destroying the part (oxidation), or indirectly by causing inflammation.

Corrosive means any chemical that will dissolve the structure of an object. Corrosive materials are highly reactive that causes damage to living tissue. They can be acids, oxidizers, or bases. When they come in contact with a surface, the surface starts to  deteriorate. Deterioration of material can be happen in minutes, days or years. 

Corrosion of non-living surfaces such as metals is a distinct process. For example, a water-air electrochemical cell corrodes iron to rust.

Corrosive materials can cause serious immediate risk to skin, tissues, eyes, lungs, and other parts of the body. Any external body part coming in contact with a corrosive material must be flushed with water IMMEDIATELY and medical attention given.

Some corrosive chemicals, mostly acids such as hydrochloric acid and nitric acid, are volatile and can emit corrosive mists upon contact with air. Inhalation can damage the respiratory tract.

Corrosive substances are most hazardous to eyesight. A drop of a corrosive substance may cause blindness within 2–10 seconds through opacification or direct destruction of the cornea.

Ingestion of corrosives can induce severe consequences, including serious damage of the gastrointestinal tract, which can lead to vomiting, severe stomach aches, and death.


  • Never store corrosive liquids above the eye level.
  • Always add acids to water.
  • Segregate acids and bases in storage.
  • When mixing corrosive solids with water, always slowly add the corrosive solid to the water while stirring continuously.
  • Store corrosive material away from heat/flames, oxidizers and water sources. Keep containers closed.

E.g.: Hydrochloric acid, Glycolic acid, Sodium hydroxide, Amines, Sulfuric acid, Hydrogen peroxide.