Description

2,2′-Methylenebis(6-tert-Butyl-4-Ethylphenol) is a high-performance hindered phenolic antioxidant widely recognized for its excellent thermal stability and low volatility. This compound is critical for preventing oxidative degradation and extending the service life of polymers and hydrocarbon-based materials. It is an essential additive for manufacturers in the rubber, plastics, lubricant, and fuel industries seeking to enhance product durability and performance under demanding conditions.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), polystyrene, and engineering plastics to prevent thermal-oxidative degradation during processing and end-use.
• Rubber Industry: Protects synthetic rubbers (SBR, BR, NBR) and natural rubber against aging, maintaining elasticity and mechanical properties.
• Lubricants & Greases: Antioxidant additive in industrial and automotive lubricants, transmission fluids, and synthetic greases to inhibit sludge formation and viscosity increase.
• Fuel & Petrochemicals: Stabilizer for 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, sealants, and caulking compounds.
• Elastomers & Latex: Used in the production of latex products, foam, and elastomeric materials to prevent discoloration and embrittlement.

Basic Information

Product Name	2,2′-Methylenebis(6-tert-Butyl-4-Ethylphenol)
CAS No.	88-24-4
Molecular Formula	C25H36O2
Molecular Weight	368.56 g/mol
Synonyms	Antioxidant 425; 2,2'-Methylenebis(4-ethyl-6-tert-butylphenol); Ethyl 702; AO 425; Bis(2-hydroxy-3-tert-butyl-5-ethylphenyl)methane; 4,4'-Methylenebis(2-ethyl-6-tert-butylphenol); Antioxidant MBEP; NSC 33430
EINECS	201-810-9

Quality Control

Our production of 2,2′-Methylenebis(6-tert-Butyl-4-Ethylphenol) adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay, melting point, and impurity profile analysis, to ensure it meets precise customer and industry specifications. A Certificate of Analysis (COA) documenting purity, physical properties, and test results is provided with each shipment to guarantee traceability and compliance.

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 heat, open flames, and 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 standard
Assay (HPLC)	≥ 98.0 %
Melting Point	120 - 125 °C
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.