Description

Pentanedioic Acid, 2-((3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl)Methyl)-, Dimethyl Ester is a high-performance hindered phenolic antioxidant, specifically a diester derivative of glutaric acid. This compound is engineered to provide exceptional stabilization against thermal and oxidative degradation in a wide range of polymer matrices and industrial formulations. It is a critical additive for manufacturers in the plastics, synthetic rubber, lubricant, and adhesive industries seeking to extend product lifespan and maintain material integrity under demanding conditions.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), polyurethanes, polyamides, and engineering plastics to prevent chain scission and discoloration during processing and end-use.
• Synthetic Rubber Production: Essential for stabilizing SBR, BR, NBR, and EPDM against oxidative aging, preserving elasticity and mechanical properties.
• Lubricant & Grease Additive: Used in industrial and automotive lubricants to inhibit oil oxidation, reduce sludge formation, and extend drain intervals.
• Adhesive & Sealant Formulations: Protects hot-melt and reactive adhesives from thermal degradation during application and enhances long-term durability.
• Fuel & Petrochemical Additive: Acts as a stabilizer in fuels and hydrocarbon streams to prevent gum and peroxide formation.
• Coating & Resin Systems: Provides oxidative stability to alkyd resins and other coating binders, improving film integrity and gloss retention.

Basic Information

Product Name	Pentanedioic Acid, 2-((3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl)Methyl)-, Dimethyl Ester
CAS No.	80099-80-5
Molecular Formula	C22H34O5
Molecular Weight	378.51 g/mol
Synonyms	Dimethyl 3,5-di-tert-butyl-4-hydroxybenzylglutamate; Glutaric acid, [3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl-, dimethyl ester; Antioxidant 3125; Irganox 3125; Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite (common mis-association, but distinct); Phenolic antioxidant ester; 2-((3,5-Di-tert-butyl-4-hydroxyphenyl)methyl)pentanedioic acid dimethyl ester
EINECS	Contact for details

Quality Control

Our production of this antioxidant adheres to strict quality management systems to ensure batch-to-batch consistency and high performance. The material is manufactured and tested to meet exacting industry specifications for polymer stabilization. A comprehensive Certificate of Analysis (COA) detailing purity, assay, melting point, and specific impurity profiles is provided with every shipment to support your quality assurance protocols.

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 product is easily oxidized; minimize exposure to air during handling and keep containers tightly sealed when not in use.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	96 - 102 °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.