There are many top companies that are developing different firefighting chemicals in Canon. With fire being a serious issue and threat to destroy not just infrastructure and building but also to life, there are many companies that have come up with different chemicals that can help stop the fire. Fire extinguishers contain various chemicals that help them kill down the fire. With different companies using different chemicals, the effect of an extinguisher on the fire does vary. Nitrogen is one of the main chemical that is used in dry chemical extinguishers. Water and foam are also used with air pressure in certain extinguishers.