Description

4,4''-Thiodi(2,6-Di-tert-Butylphenol) is a high-performance phenolic antioxidant and sulfur-containing compound. Its primary value lies in its exceptional ability to inhibit oxidative degradation and extend the service life of polymers and other sensitive materials. This product is essential for formulators and manufacturers in the plastics, rubber, and specialty chemical industries who require reliable stabilization against heat and light-induced aging.

Application

• Polymer Stabilization: A key antioxidant and secondary stabilizer for polyolefins (PP, PE), elastomers, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Rubber Industry: Used as an antioxidant in synthetic rubbers (SBR, BR, NBR) and natural rubber to protect against flex-cracking and aging, preserving mechanical properties.
• Fuel & Lubricant Additive: Acts as an antioxidant in fuels, lubricating oils, and greases to prevent gum formation, sludge, and viscosity increase caused by oxidation.
• Adhesive & Sealant Formulations: Enhances the shelf-life and long-term stability of hot-melt, pressure-sensitive, and structural adhesives by inhibiting resin oxidation.
• Synergistic Blends: Often used in combination with primary antioxidants (e.g., hindered phenols) and phosphites to create highly effective, multi-functional stabilization packages.
• Industrial Fluids: Provides oxidative stability to hydraulic fluids, transformer oils, and other specialty industrial fluid systems.

Basic Information

Product Name	4,4''-Thiodi(2,6-Di-tert-Butylphenol)
CAS No.	4673-51-2
Molecular Formula	C30H46O2S
Molecular Weight	470.75 g/mol
Synonyms	4,4'-Thiobis(2,6-di-tert-butylphenol); Antioxidant 300; Bis(2,6-di-tert-butyl-4-hydroxyphenyl) sulfide; 2,6-Di-tert-butyl-4-[(2,6-di-tert-butyl-4-hydroxyphenyl)thio]phenol; AO 300; CAS 4673-51-2; Phenol, 4,4'-thiobis[2,6-bis(1,1-dimethylethyl)-]; Lowilite 26S
EINECS	225-123-8

Quality Control

Our production of 4,4''-Thiodi(2,6-Di-tert-Butylphenol) adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay (HPLC), melting point determination, and color analysis, to ensure it meets precise specifications. Certificates of Analysis (COA) documenting purity and key physical-chemical parameters are available for all shipments to support your quality assurance and regulatory compliance needs.

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 standard
Assay (HPLC)	≥ 98.0 %
Melting Point	150 - 155 °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.