Used primarily in the production of polyphenylene oxide (PPO) or polyphenylene ether (PPE), a high-performance engineering thermoplastic known for its excellent electrical insulation properties, thermal stability, and resistance to water and chemicals. This polymer is widely used in automotive components, electrical and electronic equipment, and household appliances. Also serves as an intermediate in the synthesis of antioxidants for plastics, rubber, and lubricants, helping to extend material life by preventing oxidative degradation. Additionally, it finds use in the manufacture of dyes, pharmaceuticals, and agrochemicals due to its reactive aromatic structure.