What is Phosphorus(III) oxide?
[[File:Phosphorus trioxide.svg|thumb|Phosphorus trioxide structure]] '''Phosphorus(III) oxide''', also known as '''phosphorus trioxide''', is a [[chemical compound]]. Its chemical formula is P<sub>2</sub>O<sub>3</sub> or P<sub>4</sub>O<sub>6</sub>. It contains phosphorus in its +3 [[oxidation state]]. It contains [[phosphorus]] and [[oxide]] [[ion]]s. == Properties == It is a white, waxy solid that can absorb water. It reacts with water to make [[phosphorous acid]]. It reacts with [[hydrochloric acid]] to make [[phosphorus trichloride]] and phosphorous acid. It is a [[reducing agent]]. It is toxic and has a garlic-like odor. == Preparation == It is made by burning [[phosphorus]] in a little air. This is the source of many phosphorus compounds. == Uses == It can attach to certain [[transition metal]]s. == Related pages == *[[Phosphorus(V) oxide]] *[[Phosphate]] *[[Phosphite]] [[Category:Phosphorus compounds]] [[Category:Oxides]]