Description

4,4'-Methylenebis(2,6-Di-tert-Butylphenol) is a high-performance sterically hindered phenolic antioxidant. This compound is critical for preventing oxidative degradation and extending the service life of polymers, fuels, and lubricants. It is an essential additive for manufacturers in the plastics, rubber, synthetic fiber, and petrochemical industries seeking to enhance product stability and performance.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), polystyrene, ABS, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Rubber Industry: Used in synthetic rubbers (SBR, BR, NBR) and latex to inhibit oxidation, prevent chain scission, and maintain elasticity.
• Fuel & Lubricant Additive: Antioxidant for gasoline, jet fuels, transformer oils, and industrial lubricants to reduce gum formation and acid generation.
• Synthetic Fiber Production: Protects polyamide and polyester fibers from yellowing and strength loss caused by heat and oxidation.
• Adhesives & Sealants: Enhances the shelf-life and thermal stability of hot-melt adhesives, polyurethane sealants, and other formulated products.
• Intermediate for Advanced Antioxidants: Serves as a key building block in the synthesis of higher molecular weight and multifunctional antioxidant systems.

Basic Information

Product Name	4,4'-Methylenebis(2,6-Di-tert-Butylphenol)
CAS No.	118-82-1
Molecular Formula	C29H44O2
Molecular Weight	424.66 g/mol
Synonyms	Antioxidant 702; Bis(3,5-di-tert-butyl-4-hydroxyphenyl)methane; 2,2'-Methylenebis(6-tert-butyl-4-methylphenol) (common misnomer); 4,4'-Methylenebis(2,6-di-tert-butylphenol); MBDBP; AO 702; Ethanox 702; Lowinox 22M46; Antioxidant KY 7930; 2,6-Di-tert-butyl-4-[(3,5-di-tert-butyl-4-hydroxyphenyl)methyl]phenol
EINECS	204-279-1

Quality Control

Our production of 4,4'-Methylenebis(2,6-Di-tert-Butylphenol) adheres to stringent quality management protocols. Every batch is analyzed to ensure it meets precise specifications for purity, color, and melting point. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided to guarantee consistent performance and reliability for your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. Under these conditions, the product has excellent shelf stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5 %
Melting Point	154 - 158 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %
Solution Color (APHA)	≤ 100

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.