Fire Extinguisher Gas Mixture
Sodium bicarbonate, regular or ordinary used on class B and C fires, was the first of the dry chemical agents developed. In the heat of a fire, it releases a cloud of carbon dioxide that smothers the fire. That is, the gas drives oxygen away from the fire, thus stopping the chemical reaction.
Few examples are given below
IG 541 (CO2 8% + Ar 40% + N2 52%)
IG 55 / ARGONITE (Ar 50% + N2 50%)
IG 100 (Nitrogen 99.999%)