FSS fire extinguishing agent is a new type of fire extinguishing agent.It is asolid mixture compoosed ofoxidant, reducing agent,combustion ratecontrol agent and adhesive.The release of hot fss fire extinguishing agent is through combustion reaction,and there are both substance solid and gas in the product.Most ofthem are fireextinguishing gases,such as nitrogen,carbon dioxide and water vapor.The solid particles are oxides of K (kalium)and Sr (strontium).When the released product cools and condenses,it produces very fine particles with adiameter of less than 01μm These veryfine partides can effectively absorb and neutralize the combustion free radicals in the flame,soas to achieve the chemical suppression of fire extinguishing. The aerosolformed by solid particles in the fire extinguishing gas canbe suspendedfor a long time,and can bypass obstacles and spread to every comer to bythe flame in a shortperiod oftime,the tem-perature of the flame will be reduced,and the heat radiated to thecombustion surface and used to spit the vaporizedcombustible molecules into free radicals will bereduced,and the combustion rea-ction will be restrained to a certain extent