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Propionic anhydride
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<p>Propionic anhydride is an <a href="/facts/Organic_compound/gqCNaN45">organic compound</a> with the <a href="/facts/Chemical_formula/hghUtthl">formula</a> (CH3CH2CO)2O. This simple <a href="/facts/Acid_anhydride/0LvHIgAY">acid anhydride</a> is a colourless liquid. It is a widely used <a href="/facts/Reagent/c3GLInCu">reagent</a> in <a href="/facts/Organic_synthesis/aprl6Iq7">organic synthesis</a> as well as for producing specialty derivatives of cellulose. </p>