Phthalic Acid is a colorless, crystalline organic compound with the chemical formula C₈H₆O₄. It is primarily used in the production of plasticizers, which are substances added to plastics to increase their flexibility and durability. Phthalic acid is also a key ingredient in the manufacture of dyes, pigments, and resins. This compound is derived from naphthalene and can be produced through the oxidation of o-xylene. While it has many industrial applications, concerns have been raised about its potential health effects, leading to increased regulation and research into safer alternatives.