M-xylene appears as a colorless watery liquid with a sweet odor. Less dense than water. Insoluble in water. Irritating vapor. (USCG, 1999)M-xylene is a xylene carrying methyl groups at positions 1 and 3.

Used as a raw material for isomerization to produce p-xylene and o-xylene.Used as a solvent or a component in gasoline blending.Used in the production of resins and fine chemical products.