Explanatory notes
… pentoxide, phosphoric anhydride) (P 2 O 5 ) is obtained by combustion, in dry air, of phosphorus extracted from natural … white powder, absorbs water avidly, and is transported in airtight packings. It is used for drying gases, and in … in crystalline, amorphous or vitreous form. These three varieties mixed together give “phosphoric snow”, classified …