2,6-Dichlorophenylacetic acid is an organic compound featuring a phenylacetic acid core substituted with two chlorine atoms at the ortho positions relative to the acetic acid side chain. It is a white to off-white crystalline powder. This structure makes it a versatile building block in organic synthesis, particularly for constructing more complex molecules. Its primary and most significant application is as a key pharmaceutical intermediate. It serves as a crucial precursor in the synthesis of Diclofenac, a widely used nonsteroidal anti-inflammatory drug (NSAID). The 2,6-dichlorophenyl moiety is essential for the drug's biological activity. Beyond this major use, it finds application in the synthesis of other bioactive compounds and agrochemicals due to its reactive carboxylic acid group and the electron-withdrawing chlorine substituents. The compound should be handled with care as it may cause skin and eye irritation. It is typically stored in a cool, dry place away from strong oxidizing agents.