Description

1,3,5-Tris(3,5-Di-tert-Butyl-4-Oxo-2,5-Cyclohexadien-1-Ylidenemethyl)-2,4,6-Trimethylbenzene is a high-performance, sterically hindered phenolic compound known for its exceptional antioxidant properties. This molecule is critical for protecting polymers, synthetic rubbers, and other industrial materials from oxidative degradation, thereby extending their service life and maintaining performance under demanding conditions. It is an essential additive for manufacturers in the plastics, elastomer, and specialty chemical industries who require reliable, long-term stabilization for their products.

Application

• Primary antioxidant and stabilizer for polyolefins (e.g., polyethylene, polypropylene) to prevent thermal and oxidative degradation during processing and end-use.
• Stabilizing agent for synthetic rubbers and elastomers, including styrene-butadiene rubber (SBR) and ethylene-propylene-diene monomer (EPDM), to enhance durability.
• Additive in lubricants, greases, and transformer oils to inhibit oxidation and sludge formation, improving operational lifespan.
• Stabilizer for adhesives and sealants to prevent premature hardening and loss of adhesive properties.
• Protective agent in hydrocarbon-based fuels to prevent gum formation and oxidative instability.
• Intermediate in the synthesis of more complex, high-molecular-weight hindered phenol antioxidants.

Basic Information

Product Name	1,3,5-Tris(3,5-Di-tert-Butyl-4-Oxo-2,5-Cyclohexadien-1-Ylidenemethyl)-2,4,6-Trimethylbenzene
CAS No.	20357-51-1
Molecular Formula	C54H72O3
Molecular Weight	775.15 g/mol
Synonyms	1,3,5-Tris(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene-methyl)-2,4,6-trimethylbenzene; Tris(3,5-di-tert-butyl-4-oxobenzyl)mesitylene; Antioxidant 1790; AO-1790; 2,4,6-Trimethyl-1,3,5-tris[(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl]benzene; 1,3,5-Tris[(3,5-bis(1,1-dimethylethyl)-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-2,4,6-trimethylbenzene; Tris(3,5-di-tert-butyl-4-hydroxybenzyl)mesitylene derivative
EINECS	243-773-1

Quality Control

Our production of 1,3,5-Tris(3,5-Di-tert-Butyl-4-Oxo-2,5-Cyclohexadien-1-Ylidenemethyl)-2,4,6-Trimethylbenzene adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity. The product undergoes rigorous analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer and industry specifications. A comprehensive Certificate of Analysis (COA) detailing purity, physical characteristics, and test results 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 a controlled room temperature (15-25°C). This material is light-sensitive and easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation to maintain optimal efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to light yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	224 - 228 °C
Loss on Drying	≤ 0.5 %
Residue on Ignition	≤ 0.1 %

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