phosphoric anhydride

American  

noun

Chemistry.

1. phosphorus pentoxide.

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Etymology

Origin of phosphoric anhydride

First recorded in 1875–80

Example Sentences

This compound on heating with phosphoric anhydride loses water and yields anthraquinone, It may be prepared in a similar manner by heating phthalyl chloride with benzene in the presence of aluminium chloride.

From Project Gutenberg

Of the hygroscopic substances in common use, phosphoric anhydride, concentrated sulphuric acid, and dry potassium hydrate are almost equal in power; sodium hydrate and calcium chloride are not much behind.

From Project Gutenberg

Carbonic anhydride and phosphoric anhydride may also be readily obtained in any desired quantity by slight alteration; but in case of phosphorus the air must be allowed to enter only gently, since a rapid current would at all times determine the fracture of the vessel.—Chem.

From Project Gutenberg

Phosphoric anhydride, when heated to low redness, burns with a pale flame in fluorine, forming a gaseous mixture of fluorides and oxyfluoride of phosphorus.

From Project Gutenberg

Sulphur 17.07 Manganese 30.31 Phosphoric anhydride 0.61 Iron 7.13 Bases 35.04 An analysis of an average sample gave: Per cent.

From Project Gutenberg