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.

五氧化二磷（ P 2 O 5 ） ·五氧化二磷是在过量氧气存在下素磷到的、晶体轻质粉末。

During microdermabrasion, fine crystals usually remove the superficial or uppermost layer of the epidermis, known as the stratum corneum.

在晶磨皮过程中，晶体能消除表皮上面的或者凸起的部位被称为角质层。