Description

4,4'-Isopropylidenebis(2-T-Butylphenol) CAS NO 79-96-9 is a high-purity phenolic antioxidant widely recognized for its excellent performance in stabilizing polymers and other organic materials. Its primary value lies in its ability to inhibit oxidative degradation, thereby extending the service life and maintaining the physical properties of finished products. This compound is essential for manufacturers in the polymer, rubber, and lubricant industries seeking reliable, high-performance stabilization solutions.

Application

• Primary antioxidant in polyolefins (PP, PE) and other polymers to prevent thermal-oxidative degradation during processing and end-use.
• Stabilizer for synthetic rubbers and elastomers to enhance durability and resist cracking.
• Additive in lubricating oils, greases, and hydraulic fluids to improve oxidative stability and service life.
• Intermediate in the synthesis of more complex antioxidant molecules and specialty chemicals.
• Stabilizing agent for adhesives, sealants, and coatings to prevent premature aging and maintain performance.
• Used in the production of high-performance plastics for automotive and electrical applications requiring long-term thermal stability.

Basic Information

Product Name	4,4'-Isopropylidenebis(2-T-Butylphenol)
CAS No.	79-96-9
Molecular Formula	C23H32O2
Molecular Weight	340.50 g/mol
Synonyms	2,2'-Methylenebis(6-tert-butyl-4-methylphenol); Antioxidant 2246; AO 2246; Bis(2-hydroxy-3-tert-butyl-5-methylphenyl)methane; 4,4'-Methylenebis(2-tert-butyl-6-methylphenol); Phenol, 4,4'-methylenebis[2-(1,1-dimethylethyl)-6-methyl-]; Lowinox 22M46; Santowhite Powder
EINECS	201-240-8

Quality Control

Our production of 4,4'-Isopropylidenebis(2-T-Butylphenol) adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications using advanced techniques like HPLC and GC. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to support your quality assurance processes.

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, consider an inert atmosphere. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.5%
Melting Point	125°C - 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.