pentoxide

[ pen-tok-sahyd ]

/ pɛnˈtɒk saɪd /

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noun Chemistry.

an oxide containing five atoms of oxygen, as phosphorus pentoxide, P2O5.

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Origin of pentoxide

1860–65; pent- + oxide

Words nearby pentoxide

pentose, pentose nucleic acid, pentose phosphate pathway, Pentothal, Pentothal sodium, pentoxide, pentstemon, pent-up, pentyl, pentyl acetate, pentylenetetrazol

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use pentoxide in a sentence

The selenide was collected and dried in an atmosphere of nitrogen, and then in a vacuum, in presence of phosphorus pentoxide.
Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives|Y-Gwan Chen
The nitrates are an important class of salts, and may be looked on as compounds of the bases with nitric pentoxide (N2O5).
A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer
Maleic anhydride is obtained by distilling fumaric acid with phosphorus pentoxide.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3|Various
When heated with phosphorus pentoxide it yields acetone, water and some pseudo-cumene.
Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 7|Various

The phosphorus combines with the oxygen to form an oxide of phosphorus, known as phosphorus pentoxide.
An Elementary Study of Chemistry|William McPherson

British Dictionary definitions for pentoxide

pentoxide

/ (pɛntˈɒksaɪd) /

noun

an oxide of an element with five atoms of oxygen per molecule

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012