Potassium bicarbonate & Urea Advanced (AKA Monnex), used on class B and C fires. More effective than all other powders resulting from its power to decrepitate (wherever the powder breaks up into lesser particles) inside the flame zone developing a much larger floor region for free radical inhibition. Grey in https://angelinai886tws6.blogdemls.com/29790968/little-known-facts-about-extinguisher-service