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Reference.org
Triphenylphosphine oxide
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<p>Triphenylphosphine oxide (often abbreviated TPPO) is the <a href="/facts/Organophosphorus_compound/kNgIF93U">organophosphorus compound</a> with the formula O=P(C6H5)3, also written as Ph3PO or PPh3O (Ph = <a href="/facts/Phenyl/Ql9Yx5uu">C6H5</a>). It is one of the more common <a href="/facts/Phosphine_oxides/Tq9TMtn4">phosphine oxides</a>. This colourless crystalline compound is a common but potentially useful waste product in reactions involving <a href="/facts/Triphenylphosphine/nYFNCVcJ">triphenylphosphine</a>. It is a popular reagent to induce the <a href="/facts/Crystallization/oCUUG80k">crystallizing</a> of chemical compounds. </p>