Description

2,6-Di-tert-Butyl-4-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)-4-Methyl-2,5-Cyclohexadien-1-One is a high-performance hindered phenolic antioxidant, valued for its exceptional ability to inhibit oxidative degradation in polymers and other organic materials. Its primary commercial value lies in extending the service life and maintaining the physical properties of sensitive materials exposed to heat and oxygen. This compound is essential for manufacturers in the plastics, rubber, and specialty chemical industries seeking to enhance product stability and performance.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal-oxidative degradation during processing and long-term use.
• Fuel & Lubricant Additive: Used in gasoline, diesel, and industrial lubricants to inhibit gum formation and oxidative breakdown, improving shelf life and engine performance.
• Adhesive & Sealant Formulations: Protects the integrity of polyurethane, silicone, and other adhesive systems from embrittlement caused by oxidation.
• Elastomer Production: Critical for stabilizing SBR, BR, NBR, and EPDM rubbers in tire manufacturing and industrial rubber goods.
• Food Contact Materials: Employed in polymer stabilizer systems for packaging materials where regulatory compliance for indirect food contact is required.
• Coating Resins: Enhances the weatherability and color stability of alkyd, acrylic, and other coating resins.
• Synergistic Blends: Often used in combination with phosphite or thioester secondary antioxidants (synergists) for enhanced stabilization efficacy.
• Technical Grade Chemical Intermediate: Serves as a key building block for the synthesis of more complex antioxidant molecules and specialty additives.

Basic Information

Product Name	2,6-Di-tert-Butyl-4-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)-4-Methyl-2,5-Cyclohexadien-1-One
CAS No.	14387-13-4
Molecular Formula	C29H42O2
Molecular Weight	422.65 g/mol
Synonyms	2,6-Di-tert-butyl-4-(3,5-di-tert-butyl-4-hydroxyphenyl)-4-methyl-2,5-cyclohexadien-1-one; 4-Methyl-2,6-di-tert-butyl-4-(3,5-di-tert-butyl-4-hydroxyphenyl)-2,5-cyclohexadien-1-one; Antioxidant 300; AO 300; Irganox 1330; Ethanox 330; Lowinox 22M46; 1,1,3-Tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane (related structure); Tris(4-hydroxy-3,5-di-tert-butylphenyl)butane (common misnomer); Phenolic antioxidant 330
EINECS	Contact for details

Quality Control

Our production of 2,6-Di-tert-Butyl-4-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)-4-Methyl-2,5-Cyclohexadien-1-One adheres to stringent quality management systems, ensuring batch-to-batch consistency and high purity. The material is manufactured and tested to meet relevant industry specifications for polymer additives. Certificates of Analysis (COA) detailing purity, melting point, color, and specific impurity profiles are provided with each shipment to guarantee 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 room temperature (15-25°C). Keep away from heat, open flames, and strong oxidizing agents. Under these conditions, the product will maintain its specified properties for extended periods.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	240 - 245 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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