Potassium bicarbonate & Urea Complicated (AKA Monnex), utilised on course B and C fires. More effective than all other powders on account of its power to decrepitate (where the powder breaks up into scaled-down particles) during the flame zone developing a greater surface area spot free of charge radical inhibition. https://southafricanmotivationals68912.blogdigy.com/rumored-buzz-on-basic-fire-fighting-training-42890080