Description

1,1-Bis[2-(2-Hydroxyethoxy)-3,5-Di-tert-Pentylphenyl]Ethane is a specialized phenolic antioxidant and light stabilizer. This high-performance additive is engineered to provide exceptional protection against thermal degradation and UV-induced oxidation in polymer systems. It is a critical component for manufacturers in the plastics, coatings, and synthetic fiber industries seeking to enhance the durability and longevity of their products under demanding environmental conditions.

Application

• Polymer Stabilization: Primary application as a highly effective antioxidant and light stabilizer in polyolefins (e.g., PP, PE), polyurethanes, and engineering plastics to prevent chain scission and discoloration.
• Synthetic Fibers: Used in the production of nylon, polyester, and polypropylene fibers to maintain tensile strength and colorfastness during processing and end-use.
• Protective Coatings & Adhesives: Incorporated into industrial coatings, automotive finishes, and adhesive formulations to inhibit oxidative cross-linking and preserve film integrity and gloss.
• Elastomers & Rubber Compounds: Enhances the heat aging resistance of synthetic rubbers, such as SBR and EPDM, used in automotive seals, hoses, and belts.
• Lubricant & Fuel Additive: Serves as an antioxidant additive in synthetic lubricants, greases, and fuels to reduce sludge formation and extend service life.
• Masterbatch Production: A key active ingredient in antioxidant and UV stabilizer concentrate masterbatches for simplified and uniform dispersion in polymer processing.

Basic Information

Product Name	1,1-Bis[2-(2-Hydroxyethoxy)-3,5-Di-tert-Pentylphenyl]Ethane
CAS No.	103556-61-2
Molecular Formula	C44H74O6
Molecular Weight	699.06 g/mol
Synonyms	1,1-Bis[2-(2-hydroxyethoxy)-3,5-di-tert-pentylphenyl]ethane; Bis[2-(2-hydroxyethoxy)-3,5-di-tert-pentylphenyl]ethane; Ethanox® 398 (Trade Name); Antioxidant 398; Phenolic antioxidant with ethoxy side chains; Light stabilizer 103556-61-2; UV absorber/stabilizer for polymers; 2,2'-Ethylidenebis(4,6-di-tert-pentylphenol) ethoxylate
EINECS	Contact for details

Quality Control

Our production of 1,1-Bis[2-(2-Hydroxyethoxy)-3,5-Di-tert-Pentylphenyl]Ethane adheres to stringent quality management protocols. Every batch is characterized and tested to ensure consistent purity, performance, and compliance with relevant industry specifications for polymer additives. Comprehensive analytical documentation, including a detailed Certificate of Analysis (COA) with HPLC purity data, is provided to guarantee traceability and support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials. Under these conditions, the product remains stable for extended periods.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	90 - 105 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.