Pentoxide

As the phosphoric anhydride, or pentoxide, which is produced when a gas containing phosphorus burns, is a solid body, it may be deposited at the burner jets. ❋ W. J. Atkinson Butterfield (N/A)

For example, vanadium pentoxide (V2O5) is used production of glass and ceramics and as a chemical catalyst. ❋ Unknown (2008)

The majority of vanadium pentoxide used in glass manufacturing is imported from South Africa. ❋ Unknown (2008)

It spontanteously ignites in air at about room temperature to form “phosphorus pentoxide” – actually tetraphosphorus decaoxide, P4O10. ❋ Unknown (2005)

Burning WP produces a hot, dense white smoke composed of particles of phosphorus pentoxide, which are converted by moist air into phosphoric acid. ❋ Unknown (2005)

The White Phosphorus flame produces a hot, dense white smoke composed of particles of phosphorus pentoxide ❋ Unknown (2006)

The White Phosphorus flame produces a hot, dense white smoke composed of particles of phosphorus pentoxide, which are converted by moist air into phosphoric acid. ❋ Unknown (2006)

When exposed to air, it spontaneously ignites and is oxidized rapidly to phosphorus pentoxide. ❋ Unknown (2006)

Anniston the phosphorous was burned in air to produce its pentoxide which could be hydrated to form acid of any desired concentration. ❋ Unknown (2003)

The major plant nutrients (nitrogen, phosphorus pentoxide and potassium oxide) are likely to be about 3% by weight, three times the concentration in compost from municipal refuse. ❋ Unknown (1992)

Grades or nutrient content of fertilizers are usually given as percentage by weight of their elemental nitrogen (N), phosphorus pentoxide ❋ Unknown (1991)

They contain phosphorus in the form of phosphorus pentoxide. ❋ Unknown (1976)

The exit tube from the phosphorus pentoxide should be drawn down to form a nozzle, from, say, half an inch to one-eighth of an inch in diameter, so as to easily fit almost any bit of rubber tube. ❋ Richard Threlfall (N/A)

As an additional precaution against dust, I sometimes add a tube containing a long plug of glass wool, between the phosphorus pentoxide and the delivery tube, and also a tube containing stick potash on the entry side of the calcium chloride tube, but it may safely be left to individual judgment to determine when these additions require to be made. ❋ Richard Threlfall (N/A)

The phosphorus pentoxide tube is best made as shown simply from a bit of wide tube, with two side connections fused to the rest of the pump. ❋ Richard Threlfall (N/A)

Also anybody can easily try for himself whether exposing a mica condenser plate which has been examined in presence of phosphorus pentoxide to ordinary air for five minutes will not enormously increase the residual charge, as has always been the case in the writer's experience, and if so, it is open to him to suggest some cause other than surface creeping as an explanation. ❋ Richard Threlfall (N/A)

The apparatus consists of a solid and heavy block of wood supporting a calcium-chloride tube permanently connected with a tube of phosphorus pentoxide divided into compartments by plugs of glass wool. ❋ Richard Threlfall (N/A)

In composition it contains about 20 per cent. of water, about a third of its substance being phosphoric acid, or phosphorus-pentoxide; sometimes nearly half of it is alumina, with small quantities of iron in the form of variously coloured oxides, with oxide of manganese. ❋ John Mastin (N/A)

I have kept one very conveniently in a vacuum desiccator over phosphorus pentoxide, but if of any size, the condenser deserves a box to itself, and this must be air-tight and provided with a drying reagent, so arranged that it can be removed through a manhole of some sort. ❋ Richard Threlfall (N/A)