Used as an intermediate in the synthesis of dyes and pigments, particularly in the production of triarylmethane dyes which are valued for their intense color and stability. It also serves as a building block in the development of photochromic materials, which change color upon exposure to light, making it useful in optical switches and smart windows. Additionally, it finds application in the preparation of certain pharmaceuticals and agrochemicals due to its aromatic and functionalized structure that can be further modified. Its aldehyde group allows for easy derivatization, enabling its use in condensation reactions to form Schiff bases and other functional compounds.