Phosphorous Pentoxide(P 2 O 5 ) ?P 2 O 5 is a kind of light white minicrystal powder which is made by burning phosphorus with excess oxygen.

五化二磷（ P 2 O 5 ） ·五化二磷是在在下燃烧元素磷得到的白色、微晶体轻质粉末。