Description

4,4'-Methylenebis(2,5-Dimethylphenol) is a high-purity phenolic compound widely utilized as a key intermediate and antioxidant in advanced material synthesis. Its molecular structure provides excellent thermal stability and radical scavenging properties, making it critical for enhancing product longevity and performance. This chemical is essential for manufacturers in the polymer, specialty chemical, and pharmaceutical industries seeking reliable, high-quality raw materials for demanding applications.

Application

• Polymer Stabilizer & Antioxidant: Used as a highly effective primary antioxidant in polyolefins (e.g., polyethylene, polypropylene), engineering plastics, and synthetic rubbers to prevent thermal and oxidative degradation during processing and service life.
• Epoxy Resin Curing Agent/Modifier: Acts as a hardener or co-curing agent in epoxy resin systems, contributing to improved cross-linking density, thermal resistance, and mechanical properties of the final cured material.
• Pharmaceutical Intermediate: Serves as a crucial building block in the synthesis of complex active pharmaceutical ingredients (APIs) and other fine chemicals requiring a sterically hindered bisphenol core.
• Lubricant & Fuel Additive: Incorporated into advanced lubricant formulations and industrial fuels as an antioxidant additive to inhibit sludge formation, viscosity increase, and acid generation.
• Adhesive & Coating Formulations: Enhances the durability and aging resistance of high-performance adhesives, sealants, and protective coatings by providing oxidative stability.
• Specialty Chemical Synthesis: Employed as a versatile monomer or intermediate in the production of other specialty chemicals, including other phenolic antioxidants, UV stabilizers, and flame retardants.

Basic Information

Product Name	4,4'-Methylenebis(2,5-Dimethylphenol)
CAS No.	111329-41-0
Molecular Formula	C₁₇H₂₀O₂
Molecular Weight	256.34 g/mol
Synonyms	2,2'-Methylenebis(4,6-dimethylphenol); Bis(2-hydroxy-3,5-dimethylphenyl)methane; 4,4'-Methylenebis(2,5-xylenol); Phenol, 4,4'-methylenebis[2,5-dimethyl-; Antioxidant 702; 2,5-Dimethyl-4,4'-dihydroxydiphenylmethane; MBX (abbreviation); 4,4'-(Methylenedi-2,5-phenylene)diol
EINECS	Contact for details

Quality Control

Our 4,4'-Methylenebis(2,5-Dimethylphenol) is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. Certificates of Analysis (COA) documenting key parameters such as assay, melting point, and specific impurities are available upon request, providing full traceability and compliance assurance for your quality protocols.

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 (store under inert atmosphere) and light-sensitive (store away from light). Keep away from strong oxidizing agents, strong acids, and bases. For long-term storage, consider packaging under an inert gas such as nitrogen or argon.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Melting Point	160°C - 165°C
Assay (HPLC)	≥ 98.5%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.0%

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