CLASSIFICATIONS AND HANDLING OF DANGEROUS SUBSTANCES
Dangerous materials are having specific physical or chemical properties that could lead to 
potential hazard to human safety and health if not controlled properly.Hydrogen Peroxide 
and Lead Nitrate are examples of this category.Many of the are reactive and are liable to heating up. Three subcategories of 
flammable solids are Class 4.1 - Flammable solids that burns and decompose explosively and 
emits toxic gases, Class 4.2 - Spontaneous Combustible that react quickly with oxygen, Class 4.3 
- dangerous when wet as they react with water producing flammable gases that could be ignited 
by the heat.Most of them are dangerous as they affect the human metabolism or react 
with oxygen and would result in the release of toxins and poisonous substances
Class 3: Flammable Liquids - Flammable liquids are combustible at low temperatures and 
encounters huge risk of exposing to ignitions
Class 4: Flammable Solids - Flammable solids are dangerous as they are easily combustible while 
transporting.Calcium carbide on contacting with water produces acetylene gas which is easily 
combustible is an example of this category.