2-Phenylquinazoline-4-carboxylic acid is primarily utilized in the field of medicinal chemistry as a key intermediate in the synthesis of various biologically active compounds. Its structure serves as a scaffold for developing potential therapeutic agents, particularly in the design of inhibitors targeting enzymes or receptors involved in diseases. This compound is also explored in the development of fluorescent probes and dyes due to its aromatic and conjugated system, which can exhibit unique photophysical properties. Additionally, it finds application in organic synthesis as a building block for constructing more complex heterocyclic compounds with potential pharmacological or material science applications.