Description

4,4'-Thiobis(2-Methyl-6-tert-Butylphenol) is a high-performance phenolic antioxidant widely recognized for its exceptional efficacy in preventing oxidative degradation. This compound matters because it provides superior thermal and processing stability, extending the service life and maintaining the physical properties of sensitive materials. It is primarily needed by manufacturers in the polymer, rubber, and lubricant industries seeking reliable protection against chain-breaking autoxidation.

Application

• Polymer Stabilization: A primary antioxidant for polyolefins (PP, PE), polystyrene, and engineering plastics to prevent thermal oxidation during processing and end-use.
• Rubber Industry: Used in the production of synthetic rubbers (SBR, BR) and latex to inhibit oxidation and retard aging, preserving elasticity.
• Lubricants & Greases: Functions as an antioxidant in industrial oils, transmission fluids, and synthetic lubricants to control viscosity increase and sludge formation.
• Adhesives & Sealants: Protects adhesive formulations based on synthetic polymers from oxidative cross-linking and loss of tack.
• Fuel Additive: Acts as a stabilizer in gasoline and diesel to prevent gum formation and oxidative degradation during storage.
• Fat & Oil Protection: Used as an antioxidant in technical-grade fats, oils, and waxes to extend shelf life.

Basic Information

Product Name	4,4'-Thiobis(2-Methyl-6-tert-Butylphenol)
CAS No.	96-66-2
Molecular Formula	C22H30O2S
Molecular Weight	358.54 g/mol
Synonyms	2,2'-Thiobis(6-tert-butyl-4-methylphenol); Antioxidant 300; AO 300; Bis(2-methyl-6-tert-butyl-4-hydroxyphenyl) sulfide; 4,4'-Thiobis(2-tert-butyl-5-methylphenol); Santonox R; Lowinox 44B25; CAO-6
EINECS	202-525-2

Quality Control

Our production of 4,4'-Thiobis(2-Methyl-6-tert-Butylphenol) adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with industry specifications. Certificates of Analysis (COA) detailing all critical parameters are available upon request to support your quality assurance and regulatory needs.

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	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	158 - 162 °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.