Description

4-[2-(4-Hydroxy-3,5-Ditert-Butyl-Phenyl)Propan-2-Yl]-2,6-Ditert-Butyl- Phenol is a high-performance hindered phenolic antioxidant, prized for its exceptional ability to inhibit oxidative degradation in organic materials. This compound is critical for manufacturers seeking to extend the service life and maintain the physical properties of polymers and other sensitive formulations under thermal and oxidative stress. It is an essential additive for producers in the plastics, rubber, synthetic fiber, and specialty chemical industries who require reliable, long-term stabilization.

Application

• Primary antioxidant for polyolefins (PP, PE) to prevent thermal oxidation during processing and end-use.
• Stabilizer for engineering plastics, synthetic rubbers (SBR, BR), and elastomers to retain elasticity and mechanical strength.
• Additive in adhesives, sealants, and coatings to prevent gelation and maintain viscosity stability.
• Stabilizing component in lubricating oils, greases, and hydraulic fluids to reduce sludge formation and extend fluid life.
• Used in the production of synthetic fibers to protect against UV and thermal-induced degradation.
• Intermediate in the synthesis of other specialty antioxidants and polymer additives.

Basic Information

Item	Details
Product Name	4-[2-(4-Hydroxy-3,5-Ditert-Butyl-Phenyl)Propan-2-Yl]-2,6-Ditert-Butyl- Phenol
CAS No.	25619-72-1
Molecular Formula	C29H44O2
Molecular Weight	424.66 g/mol
Synonyms	Phenol, 4,4'-(1-methylethylidene)bis[2,6-bis(1,1-dimethylethyl)-; Bis(2,6-di-tert-butyl-4-hydroxyphenyl)methane derivative; Antioxidant 300; AO 300; 2,6-Di-tert-butyl-4-[2-(3,5-di-tert-butyl-4-hydroxyphenyl)propan-2-yl]phenol; 4,4'-Isopropylidenebis(2,6-di-tert-butylphenol); Santonox R (historical/trade name)
EINECS	247-152-0

Quality Control

Every batch of our antioxidant is produced under a strict quality management system. We provide comprehensive Certificates of Analysis (COA) that detail purity, identity, and key physical parameters, ensuring traceability and compliance with your specifications. Our quality protocols are designed to meet the rigorous demands of global polymer and chemical manufacturing.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	182 - 188 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %

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