Uvitic acid (5-methylisophthalic acid) is an organic compound with the formula CH<sub>3</sub>C<sub>6</sub>H<sub>3</sub>(COOH)<sub>2</sub>. The name comes from Latin uva which means a grape. The acid is called so because it may be produced indirectly from tartaric acid, which is found in the grape. Under normal conditions, the acid is a white crystalline substance.
Uvitic acid is obtained by oxidizing mesitylene.