But it has low melting point and sintering point,when it is used to extinguish a fire,it can rapidly decompose to form a layer of film, which can cover the surface of comburent and make the fire .

• 但低聚磷酸铵具有较低的熔点和烧结点,用来灭火时能迅速分解形成膜层覆盖于燃烧物表面使火焰熄灭。