Hazardous Substances and Their Symbol
- Hazardous substances are solids, liquids, or gases that can harm people, other living organisms, property, or the environment.
- In laboratory, hazardous substances are labelled with hazard symbol.
- Hazard symbols are recognizable symbols designed to warn about hazardous materials, locations, or objects, including electric currents, poisons, and other things.
- Below are the hazard symbol that you may see in a laboratory.
Substances that can burn easily.
Example: Petrol, kerosene, alcohol, ether
A corrosive substance is one that will destroy and damage other substances with which it comes into contact.
Example: Concentrated acids and alkalis, bromine water
Substances that can explode easily
Example: Sodium, potassium
Poisonous substances are substances that cause disturbances to organisms, usually by chemical reaction when a sufficient quantity is absorbed by an organism.
Example: Bromine, chlorine, mercury
Irritants are substances that can cause rashes and discomfort to the body.
Example: Bromine, ammonia, sulphur dioxide
Radioactive substances are substances that emit radioactive radiation.
Example: Uranium, plutonium, radium