Description

4,4'-Methylenebis(2,3,5,6-Tetramethylphenol) is a high-performance sterically hindered phenolic antioxidant. This compound matters because it provides exceptional stability to polymers and other materials by effectively scavenging free radicals and preventing oxidative degradation. It is primarily needed by manufacturers in the polymer, rubber, and specialty chemical industries seeking to enhance the longevity and performance of their products under demanding conditions.

Application

• Polymer Stabilization: A key antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal and oxidative degradation during processing and end-use.
• Rubber Industry: Used as an anti-aging agent in the production of tires, seals, gaskets, and other rubber goods to extend service life.
• Lubricant & Fuel Additive: Functions as an antioxidant in high-temperature lubricating oils, greases, and industrial fuels to inhibit sludge formation and viscosity increase.
• Adhesive & Sealant Formulations: Imparts oxidative stability to hot-melt adhesives, polyurethane systems, and other reactive resins.
• Coating & Ink Applications: Protects solvent-based and radiation-curable coatings and inks from yellowing and embrittlement caused by oxidation.
• Elastomer Production: Essential for stabilizing synthetic elastomers like SBR, BR, and NBR during manufacturing and storage.
• Chemical Intermediate: Serves as a building block for the synthesis of more complex hindered phenol antioxidants and other specialty chemicals.

Basic Information

Product Name	4,4'-Methylenebis(2,3,5,6-Tetramethylphenol)
CAS No.	29366-04-9
Molecular Formula	C25H36O2
Molecular Weight	368.56 g/mol
Synonyms	2,2'-Methylenebis(3,4,6-trimethylphenol); 4,4'-Methylenebis(2,3,5,6-tetramethylphenol); Antioxidant 2246; AO 2246; Bis(3,4,6-trimethyl-2-hydroxyphenyl)methane; 2,2'-Methylenebis(4,6,8-trimethylphenol); Phenol, 4,4'-methylenebis[2,3,5,6-tetramethyl-
EINECS	249-560-3

Quality Control

Our production of 4,4'-Methylenebis(2,3,5,6-Tetramethylphenol) adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing, including HPLC and GC, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, melting point, and impurity profiles are provided with each shipment to guarantee compliance with your technical requirements.

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 to standard
Assay (HPLC)	≥ 98.0 %
Melting Point	140 - 145 °C
Loss on Drying	≤ 0.5 %
Heavy Metals (as Pb)	≤ 10 ppm

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