Stearic hydrazide is widely used as a metal deactivator and antioxidant in the polymer industry, particularly in the stabilization of polyolefins like polyethylene and polypropylene. It effectively chelates metal ions, preventing them from catalyzing the degradation of polymers, thereby extending their lifespan and maintaining their mechanical properties. Additionally, it is employed in the production of synthetic lubricants and greases, where it enhances thermal stability and reduces oxidation. In the rubber industry, stearic hydrazide acts as a processing aid, improving the vulcanization process and the final product's resistance to heat and aging. It is also utilized in coatings and adhesives to enhance their durability and performance under harsh conditions. Furthermore, it finds applications in the synthesis of surfactants and emulsifiers, contributing to the stability and functionality of various formulations.