NN-(Hexane-16-diyl)bis(3-(35-di-tert-butyl-4-hydroxyphenyl)propanamide) is a high-performance sterically hindered phenolic antioxidant. It consists of two phenolic functional groups and an amide-linked hexamethylene spacer providing excellent thermal and oxidative stability. The bulky tert-butyl substitutions prevent oxidation by stabilizing free radicals making it suitable for long-term protection of materials exposed to heat oxygen and light.