Pentoxide, also known as (partial) phosphorus acid anhydride, which is monoclinic crystal or white powder, density 2.39g/cm, melting point 580 ~ 585 ℃, 300 ℃ sublimation. Pentoxide soluble in water and sulfuric acid, insoluble in acetone and ammonia, moisture in the air, deliquescence, and organics combustion occurs. Pentoxide is an inorganic acid corrosive goods. Pentoxide stored in a cool, dry, ventilated warehouse. And combustibles, bases isolated storage and transportation. Handle with care disposal to prevent container damage. Containers must be sealed to avoid moisture and rain.