Description

3,5-Bis(1,1-Dimethyethyl)-4-Hydroxybenzenepropanoic Acid Oxy-2,1-Ethandiol Ester is a high-performance phenolic antioxidant ester, valued for its ability to inhibit oxidative degradation and extend the service life of sensitive materials. This compound is essential for formulators requiring a non-discoloring, low-volatility stabilizer that offers excellent compatibility with a wide range of polymer matrices. It is primarily sought by manufacturers in the plastics, synthetic rubber, and specialty lubricant industries to protect their products from thermal and oxidative stress.

Application

• Polymer Stabilization: Acts as a primary antioxidant in polyolefins (PP, PE), polyurethanes, and engineering plastics to prevent chain scission and maintain mechanical properties during processing and end-use.
• Synthetic Rubber Production: Inhibits oxidation and scorching in styrene-butadiene rubber (SBR), polybutadiene rubber (BR), and other elastomers, improving their aging resistance.
• Lubricant & Grease Additive: Used in synthetic engine oils, industrial lubricants, and greases to reduce sludge formation, control viscosity increase, and extend drain intervals.
• Adhesive & Sealant Formulations: Enhances the thermal stability and shelf-life of hot-melt adhesives, polyurethane sealants, and other reactive systems.
• Coating Resins: Protects acrylic, alkyd, and polyester-based coatings from yellowing and embrittlement caused by UV and thermal exposure.
• Fuel & Petrochemical Additive: Serves as a stabilizer in gasoline, diesel, and various hydrocarbon streams to prevent gum formation and oxidative degradation.

Basic Information

Product Name	3,5-Bis(1,1-Dimethyethyl)-4-Hydroxybenzenepropanoic Acid Oxy-2,1-Ethandiol Ester
CAS No.	38879-22-0
Molecular Formula	C₂₁H₃₄O₅
Molecular Weight	366.49 g/mol
Synonyms	Irganox 245; Ethylene glycol bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]; 3,5-Di-tert-butyl-4-hydroxyhydrocinnamic acid, 1,2-ethanediyl ester; Bis(3,5-di-tert-butyl-4-hydroxybenzyl) ethylene dipropionate; Antioxidant 245; Ciba Irganox 245; Evernox 245; AO-245
EINECS	254-158-5

Quality Control

Our production of 3,5-Bis(1,1-Dimethyethyl)-4-Hydroxybenzenepropanoic Acid Oxy-2,1-Ethandiol Ester adheres to a strict quality management system. Every batch is analyzed to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting key parameters are provided to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from heat sources and incompatible materials. Under these conditions, the product maintains its specified properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	76 - 79 °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.