O-Xylene

o-Xylene (ortho-xylene) is an aromatic hydrocarbon. Appears as a clear colorless liquid. It is a constitutional isomer of m-xylene and p-xylene. Less dense than water. Insoluble in water. Irritating vapor. O-xylene is used mostly to produce phthalic anhydride, an important intermediate that leads principally to various coatings and plastics.