o-Acetoacetanisidide is primarily used as an intermediate in the synthesis of organic pigments, particularly azo pigments, which are widely employed in the dyeing and printing industries. These pigments are valued for their bright and stable colors, making them suitable for applications in textiles, inks, paints, and plastics. Additionally, it serves as a key component in the production of certain pharmaceuticals and agrochemicals, where it acts as a building block for more complex molecules. Its role in these industries highlights its importance in creating vibrant, durable, and functional materials.