Description

2,2'-Thiobis[4,6-Di-tert-Butyl-m-Cresol] is a high-performance, sterically hindered phenolic antioxidant widely recognized for its exceptional efficacy in protecting polymers and organic materials from oxidative degradation. Its primary value lies in its ability to function as a highly effective primary antioxidant, scavenging free radicals to extend the service life and maintain the physical properties of sensitive materials. This compound is essential for manufacturers in the polymer, rubber, lubricant, and specialty chemical industries seeking reliable thermal and oxidative stabilization for their products.

Application

• Polymer Stabilization: A key antioxidant for polyolefins (PP, PE), polystyrene, ABS, and engineering plastics to prevent discoloration and embrittlement during processing and long-term use.
• Rubber Industry: Used in the production of synthetic rubbers (SBR, BR, NBR) and latex to inhibit aging and maintain elasticity.
• Lubricants & Fuels: Acts as an antioxidant additive in industrial lubricants, greases, and transformer oils to enhance oxidative stability and prevent sludge formation.
• Adhesives & Sealants: Protects adhesive formulations from degradation, ensuring consistent performance and shelf life.
• Food Contact Materials: Employed in stabilizer systems for polymers used in packaging where regulatory compliance for indirect food contact is required.
• Technical Waxes & Fibers: Provides stabilization for synthetic waxes and polypropylene fibers against thermal oxidation.

Basic Information

Product Name	2,2'-Thiobis[4,6-Di-tert-Butyl-m-Cresol]
CAS No.	26411-30-3
Molecular Formula	C30H46O2S
Molecular Weight	470.75 g/mol
Synonyms	2,2'-Thiobis(4,6-di-tert-butyl-m-cresol); Antioxidant 300; 4,4'-Thiobis(2-tert-butyl-5-methylphenol); Bis(2-tert-butyl-4-methyl-6-hydroxyphenyl) sulfide; 2,2'-Thiobis(4-methyl-6-tert-butylphenol); Lowinox® 300; AO-300; Santonox® R (historical).
EINECS	247-696-3

Quality Control

Our production of 2,2'-Thiobis[4,6-Di-tert-Butyl-m-Cresol] adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for assay and purity, to ensure it meets precise specifications for color, melting point, and impurity profiles. Certificates of Analysis (COA) documenting all critical quality attributes 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, 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	158 - 162 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %
Heavy Metals (as Pb)	≤ 20 ppm

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