As an important chemical substance, diphenylamine has a wide range of applications and has important industrial and commercial value. This article aims to provide readers with a detailed introduction to diphenylamine, including professional information on its properties, applications and safety. The chemical properties of diphenylamine make it widely used in many fields. As a typical aromatic amine compound, diphenylamine has the molecular formula C12H11N and has high antioxidant properties. It exhibits excellent properties in chemical synthesis. For example, diphenylamine can be used as an important raw material for the preparation of dyes, intermediates and other organic compounds. These properties make diphenylamine occupy an important position in the chemical industry. In industrial applications, the antioxidant properties of diphenylamine are particularly outstanding. It is widely used in the rubber industry as an antioxidant to extend the service life of rubber products. Diphenylamine can effectively inhibit the aging process of rubber in the air and enhance the durability and reliability of the product. In addition, diphenylamine is also widely used in lubricants and fuels, which can significantly improve the stability and performance of products. Although diphenylamine has many excellent properties, its safety performance is also an important aspect that cannot be ignored. During the industrial production and use of diphenylamine, strict safety protection measures should be taken to avoid harm to human health caused by long-term exposure. During production and storage, relevant safety standards should be followed to prevent leakage and contamination. Operators should be equipped with necessary protective equipment, such as gloves, masks and protective glasses, to ensure safe operation. In short, diphenylamine, as an important chemical raw material and additive, has been widely used in many industrial fields due to its excellent properties in chemical synthesis and antioxidant properties. However, when we use and promote diphenylamine, we must attach great importance to its safety performance and ensure the safety and environmental protection of operations. Through scientific and reasonable application and management, diphenylamine will continue to provide strong support for various industrial productions.