Description

4,4'-Methylenebis(2-tert-Butyl-6-Methylphenol) is a high-performance hindered phenolic antioxidant widely used to inhibit oxidative degradation in various organic substrates. Its primary value lies in its ability to extend the service life and maintain the physical properties of materials exposed to heat, light, and oxygen. This compound is essential for manufacturers in the polymer, rubber, lubricant, and fuel industries seeking to ensure product stability and longevity under demanding conditions.

Application

• Polymer Stabilization: A key antioxidant for polyolefins (PP, PE), polystyrene, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Rubber Industry: Used as an antioxidant and anti-aging agent in synthetic rubbers (SBR, BR, NBR) and natural rubber to prevent cracking and maintain elasticity.
• Lubricants & Greases: Functions as an effective antioxidant in industrial lubricants, transmission fluids, and greases to inhibit sludge formation and viscosity increase.
• Fuel & Petrochemicals: Acts as a stabilizer in gasoline, jet fuels, and transformer oils to prevent gum formation and oxidative breakdown.
• Adhesives & Sealants: Enhances the shelf-life and thermal stability of hot-melt adhesives, pressure-sensitive adhesives, and various sealants.
• Coating Resins: Protects alkyd, acrylic, and other coating resins from yellowing and embrittlement caused by oxidation.

Basic Information

Product Name	4,4'-Methylenebis(2-tert-Butyl-6-Methylphenol)
CAS No.	96-65-1
Molecular Formula	C23H32O2
Molecular Weight	340.50 g/mol
Synonyms	2,2'-Methylenebis(6-tert-butyl-4-methylphenol); Antioxidant 2246; MBMBP; AO 2246; Bis(2-tert-butyl-6-methyl-4-hydroxyphenyl)methane; 4,4'-Methylenebis(6-tert-butyl-2-methylphenol); Lowinox 44B25; Ethanox 736; Vulkazon AFD
EINECS	202-525-2

Quality Control

Our production of 4,4'-Methylenebis(2-tert-Butyl-6-Methylphenol) adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, melting point determination, and impurity profiling. Certificates of Analysis (COA) documenting all test results are provided and available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Melting Point	124°C - 128°C
Assay (HPLC)	≥ 98.5%
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%

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