Description

2,3-Bis[[3,5-Bis(1,1-Dimethylethyl)-4-Oxo-2,5-Cyclohexadien-1-Ylidene]Methyl]-Butanedioic Acid 1,4-Dimethyl Ester is a high-performance hindered phenolic antioxidant and light stabilizer. This compound is critical for protecting polymers and other materials from oxidative degradation and UV-induced damage, thereby extending product lifespan and maintaining performance integrity. It is essential for manufacturers in the plastics, coatings, and specialty chemical industries who require reliable stabilization for sensitive formulations.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal-oxidative degradation during processing and end-use.
• UV Light Stabilizer: Protects coatings, automotive parts, and outdoor plastic products from photo-oxidation and color fading caused by sunlight exposure.
• Additive for Lubricants and Fuels: Enhances the oxidative stability of industrial lubricants, greases, and fuel systems, reducing sludge formation.
• Adhesive and Sealant Formulations: Improves the long-term durability and weatherability of high-performance adhesives and sealants.
• Synthetic Fiber Protection: Incorporated into synthetic fibers to prevent strength loss and discoloration from heat and light.
• Masterbatch Production: Used as a key active component in antioxidant and stabilizer concentrate masterbatches for easier dispersion in polymers.

Basic Information

Product Name	2,3-Bis[[3,5-Bis(1,1-Dimethylethyl)-4-Oxo-2,5-Cyclohexadien-1-Ylidene]Methyl]-Butanedioic Acid 1,4-Dimethyl Ester
CAS No.	65849-89-0
Molecular Formula	C48H60O6
Molecular Weight	733.00 g/mol
Synonyms	2,3-Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)methyl Butanedioic Acid Dimethyl Ester; Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)methyl Succinic Acid Dimethyl Ester; Antioxidant 1790; Light Stabilizer 1790; ADK STAB LA-57; ADK STAB LA-1790; CAS 65849-89-0; Dimethyl 2,3-bis[(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl]butanedioate
EINECS	265-952-0

Quality Control

Our production of 2,3-Bis[[3,5-Bis(1,1-Dimethylethyl)-4-Oxo-2,5-Cyclohexadien-1-Ylidene]Methyl]-Butanedioic Acid 1,4-Dimethyl Ester adheres to stringent quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise technical specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

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	Yellow to light yellow powder or crystals
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	156 - 162 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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