Antioxidant MB, also known as 2-merhydryl benzimidazole, is an organic compound with the formula C7H6N2S. This compound appears primarily as a white crystalline solid with a strong sulfide odor. Antioxidant MB is widely used in the rubber industry and related fields, mainly as an important antioxidant.

The main functions of antioxidant MB include anti-oxidation and anti-aging, which can effectively extend the service life of rubber products. By reacting with free radicals in rubber, antioxidant MB can reduce the process of oxidation and aging, preventing rubber materials from hardening, cracking and losing elasticity due to oxidation. In addition, antioxidant MB also has the ability of metal complexation, can form a complex with metal ions, improve the dispersion and stability of metal in rubber, so as to improve the processing performance and anti-aging properties of rubber products.