4,4'-methylenebis(2,6-di-tert-butylphenol)

4,4'-methylenebis(2,6-di-tert-butylphenol) (CAS 118-82-1) is a hindered phenolic antioxidant. Also marketed as Ionox 220 and Binox M; E702 in food-contact applications.

Where is 4,4'-methylenebis(2,6-di-tert-butylphenol) used?

• Polymers, lubricants and elastomers: protection from oxidative degradation during processing and service life
• Lubricants: oxidation inhibition in industrial oils and metalworking fluids, extending service intervals and protecting metal surfaces
• Rubber and tire compounds: prevention of heat-induced degradation during vulcanization and in-service flexing
• Coatings and adhesives: stabilisation of resin systems against discoloration and viscosity drift during storage and cure
• In plastics processing it protects polyolefins and engineering resins during high-temperature extrusion and injection molding.

Good to know: Technical and food-contact grades exist; the food-contact designation matters for buyers sourcing into food-packaging, where high purity is required.

Commercial specifications

• Packaging: fiber drums and bags; bulk quantities for industrial procurement