Description

4-(3,5-Di-tert-Butyl-4-Hydroxybenzylidene)-2,6-Di-tert-Butyl-2,5-Cyclohexadiene-1-One is a high-performance hindered phenolic compound known for its excellent antioxidant properties. This specialized chemical is critical for protecting materials from oxidative degradation, thereby extending their functional lifespan and maintaining performance integrity. It is an essential additive for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance the stability and durability of their products.

Application

• Polymer Stabilizer: A primary antioxidant for polyolefins (PP, PE), elastomers, and engineering plastics to prevent thermal and oxidative degradation during processing and long-term service.
• Lubricant & Fuel Additive: Used in formulating high-performance lubricating oils, greases, and industrial fuels to inhibit oxidation, reduce sludge formation, and extend oil life.
• Rubber Industry: Provides antioxidant protection for synthetic rubbers and latex, preventing cracking and loss of elasticity caused by exposure to heat and oxygen.
• Adhesive & Sealant Formulations: Enhances the shelf-life and thermal stability of hot-melt adhesives, sealants, and other reactive resin systems.
• Specialty Chemical Intermediate: Serves as a key building block or precursor in the synthesis of more complex antioxidant molecules and UV stabilizers.

Basic Information

Product Name	4-(3,5-Di-tert-Butyl-4-Hydroxybenzylidene)-2,6-Di-tert-Butyl-2,5-Cyclohexadiene-1-One
CAS No.	4359-97-1
Molecular Formula	C29H40O2
Molecular Weight	420.63 g/mol
Synonyms	2,6-Di-tert-butyl-4-[(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]phenol; Phenol, 2,6-di-tert-butyl-4-[(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-; Antioxidant 1790; AO 1790; 4-(3,5-Di-tert-butyl-4-hydroxybenzylidene)-2,6-di-tert-butylcyclohexa-2,5-dien-1-one; 2,6-Di-tert-butyl-4-(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidenemethyl)phenol
EINECS	224-447-5

Quality Control

Our production of 4-(3,5-Di-tert-Butyl-4-Hydroxybenzylidene)-2,6-Di-tert-Butyl-2,5-Cyclohexadiene-1-One adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, identity, and specific impurity profiles are available upon request.

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 material is easily oxidized (store under inert atmosphere) and is light-sensitive (store away from light). Keep away from strong oxidizing agents, heat, and ignition sources.

Specification

Item	Specification
Appearance	Yellow to light yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	185 - 190 °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.