Description

4,4'-Isopropylidenebis[2,6-Di-tert-Butylphenol] is a high-performance, sterically hindered phenolic antioxidant. This compound is critical for preventing oxidative degradation and extending the service life of polymers and hydrocarbon-based materials. It is an essential additive for manufacturers in the plastics, rubber, and lubricant industries seeking to enhance product stability and durability under demanding conditions.

Application

• Primary antioxidant in polyolefins (PP, PE) and engineering plastics to prevent thermal-oxidative degradation during processing and end-use.
• Stabilizer for synthetic rubbers, elastomers, and adhesives to maintain flexibility and prevent embrittlement.
• Additive in lubricating oils, greases, and hydraulic fluids to inhibit oxidation and sludge formation.
• Stabilizing component in hydrocarbon-based fuels and transformer oils to improve shelf life.
• Intermediate in the synthesis of other specialized antioxidants and polymer additives.
• Protective agent for sensitive organic compounds susceptible to radical-mediated degradation.

Basic Information

Product Name	4,4'-Isopropylidenebis[2,6-Di-tert-Butylphenol]
CAS No.	13676-82-9
Molecular Formula	C29H44O2
Molecular Weight	424.66 g/mol
Synonyms	Bis(2,6-di-tert-butyl-4-hydroxyphenyl)methane; 2,2'-Methylenebis(6-tert-butyl-4-methylphenol) (common misnomer); 4,4'-Isopropylidenedi(2,6-di-tert-butylphenol); Antioxidant 2246; AO 2246; Phenol, 4,4'-isopropylidenebis[2,6-bis(1,1-dimethylethyl)-]; Bis(3,5-di-tert-butyl-4-hydroxyphenyl)methane
EINECS	237-172-8

Quality Control

Our production of 4,4'-Isopropylidenebis[2,6-Di-tert-Butylphenol] adheres to stringent quality management protocols. Every batch is analyzed to ensure it meets precise specifications for purity, melting point, and appearance. Certificates of Analysis (COA) documenting these results are provided to guarantee traceability and compliance with your quality 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). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Melting Point	155 - 160 °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.