Description

2,2'-Ethylidenebis(4,6-Di-tert-Pentylphenol) is a high-performance sterically hindered phenolic antioxidant. Its primary value lies in its exceptional ability to inhibit oxidative degradation and extend the service life of polymers and hydrocarbon-based materials. This compound is essential for manufacturers in the plastics, rubber, and lubricant industries seeking to enhance the thermal stability and longevity of their products.

Application

• Primary antioxidant in polyolefins (e.g., PP, PE) to prevent thermal-oxidative degradation during processing and end-use.
• Stabilizer for synthetic rubbers and elastomers to maintain elasticity and prevent cracking.
• Additive in industrial lubricants and greases to inhibit oil oxidation and sludge formation.
• Stabilizing component in adhesives, sealants, and hydrocarbon-based resins.
• Used in the formulation of fuel and gasoline additives to improve oxidation stability.
• Protective agent for hot-melt adhesives and waxes against thermal degradation.

Basic Information

Product Name	2,2'-Ethylidenebis(4,6-Di-tert-Pentylphenol)
CAS No.	91509-15-8
Molecular Formula	C34H54O2
Molecular Weight	494.80 g/mol
Synonyms	Ethylidenebis(4,6-di-tert-pentylphenol); 2,2'-Ethylidenebis(4,6-di-tert-amylphenol); Antioxidant 858; Ethan-1,1-diylbis(2,4-di-tert-pentylphenol); Bis(4,6-di-tert-pentyl-2-hydroxyphenyl)methane (incorrect but common); Phenol, 2,2'-ethylidenebis[4,6-bis(1,1-dimethylpropyl)-; AO-858; Antioxidant 1210 (related but distinct, often confused).
EINECS	Contact for details

Quality Control

Our production of 2,2'-Ethylidenebis(4,6-Di-tert-Pentylphenol) adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and performance. A Certificate of Analysis (COA) documenting these results is available for each shipment to guarantee traceability and compliance with your quality standards.

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 and should be stored under an inert atmosphere (e.g., nitrogen) for long-term preservation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	95 - 105 °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.