What is the flammable range of Hydrogen Cyanide?

The flammable range of Hydrogen Cyanide (HCN) is typically between 5.6% and 40% by volume in air. This means that in concentrations within this range, HCN can ignite and sustain a combustion reaction when exposed to an ignition source. Understanding the flammable range is crucial for firefighters and safety personnel because it helps in assessing the risks and determining the necessary precautions when dealing with this hazardous material. Knowing that the lower flammable limit is 5.6% indicates that lower concentrations below this threshold will not support combustion, while concentrations above this level up to 40% can lead to explosive or highly flammable situations. This information is key in preventing incidents and ensuring safe handling and emergency response.