Keywords: Propionic-anhydride-3D-balls.png Ball-and-stick model of the propionic anhydride molecule also known as propanoic anhydride the anhydride of propionic acid Derived from File acetic-anhydride-3D-balls png and File Diethyl-ether-3D-balls png 2011-01-15 Jynto and Ben Mills Carboxylic anhydrides Images by Jynto |