Description

4,4'-Isopropylidenebis[2-(1,1,3,3-Tetramethylbutyl)Phenol] is a high-purity, sterically hindered phenolic compound, widely recognized for its exceptional performance as an antioxidant and stabilizer. Its primary value lies in its ability to effectively inhibit oxidative degradation and thermal decomposition in various polymer systems, thereby extending product lifespan and maintaining material integrity. This chemical is essential for manufacturers in the plastics, rubber, and specialty chemical industries seeking reliable additive solutions for demanding applications.

Application

• Polymer Stabilizer: A key antioxidant and processing stabilizer for polyolefins (e.g., PP, PE), engineering plastics, and synthetic rubbers to prevent thermal and oxidative degradation during processing and in-service use.
• Adhesive & Sealant Formulations: Enhances the shelf-life and long-term stability of hot-melt adhesives, pressure-sensitive adhesives, and industrial sealants by preventing resin oxidation.
• Lubricant & Fuel Additive: Used as an antioxidant additive in industrial lubricants, greases, and fuels to reduce sludge formation and viscosity increase.
• Elastomer Production: Protects synthetic elastomers like SBR, BR, and NBR from premature aging, preserving elasticity and mechanical properties.
• Coating Resins: Incorporated into protective coatings and paint systems to improve weatherability and prevent yellowing or embrittlement.
• Intermediate for Specialty Chemicals: Serves as a crucial building block in the synthesis of more complex phenolic antioxidants and phosphite stabilizers.

Basic Information

Product Name	4,4'-Isopropylidenebis[2-(1,1,3,3-Tetramethylbutyl)Phenol]
CAS No.	19546-20-4
Molecular Formula	C35H56O2
Molecular Weight	508.82 g/mol
Synonyms	2,2'-Methylenebis(6-tert-octyl-4-methylphenol); Bis(2-tert-octyl-4-methyl-6-phenylene)methane; Antioxidant 2246-S; AO 2246-S; Phenol, 4,4'-methylenebis[2-(1,1,3,3-tetramethylbutyl)-; 6,6'-Di-tert-octyl-4,4'-methylenedi-o-cresol; Lowinox® 22M46; Ethanox® 376
EINECS	243-182-6

Quality Control

Our production of 4,4'-Isopropylidenebis[2-(1,1,3,3-Tetramethylbutyl)Phenol] adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure compliance with precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, melting point, and color are available upon request, providing full traceability and quality assurance for your supply chain.

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 strong oxidizing agents and heat sources.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0 %
Melting Point	125 - 130 °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.