Description

2,2'-Methylenebis[4-tert-Butyl-6-Cyclohexylphenol] is a high-performance, sterically 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 other sensitive materials exposed to high temperatures. It is an essential additive for manufacturers in the plastics, rubber, and synthetic fiber industries who require reliable protection against thermal aging and color formation.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to inhibit thermal-oxidative degradation during processing and long-term use.
• Elastomer Protection: Used in styrene-butadiene rubber (SBR), nitrile rubber (NBR), and other elastomers to prevent chain scission and maintain mechanical properties.
• Adhesive & Sealant Formulations: Enhances the shelf-life and thermal stability of hot-melt adhesives, polyurethane systems, and silicone sealants.
• Synthetic Fiber Production: Incorporated into polyamide and polyester fibers to protect against thermal yellowing and strength loss during high-speed spinning and drawing.
• Lubricant & Grease Additive: Functions as an antioxidant in industrial lubricants and greases to reduce sludge formation and viscosity increase under severe operating conditions.
• Fuel & Oil Stabilizer: Helps stabilize fuels, transformer oils, and hydraulic fluids against oxidation.

Basic Information

Product Name	2,2'-Methylenebis[4-tert-Butyl-6-Cyclohexylphenol]
CAS No.	55252-55-6
Molecular Formula	C35H52O2
Molecular Weight	528.79 g/mol
Synonyms	2,2'-Methylenebis(4-tert-butyl-6-cyclohexylphenol); Antioxidant 2246-S; Bis(4-tert-butyl-6-cyclohexyl-2-hydroxyphenyl)methane; 4,4'-Methylenebis(2-tert-butyl-6-cyclohexylphenol); Phenol, 2,2'-methylenebis[4-(1,1-dimethylethyl)-6-cyclohexyl-]; Lowinox® 22M46; AO 2246-S; Antioxidant 736; Irganox® 2246-S (analog)
EINECS	259-564-6

Quality Control

Our production of 2,2'-Methylenebis[4-tert-Butyl-6-Cyclohexylphenol] adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. The product is manufactured in facilities operating under ISO 9001 quality standards. Every lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key parameters such as assay, melting point, and impurity profile, available upon request.

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 material 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
Melting Point	125°C - 135°C
Assay (HPLC)	≥ 98.0 %
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.