Description

Thiobis[Tetrapropylenephenol] CAS NO 68815-67-8 is a high-purity, sulfur-bridged phenolic antioxidant. This compound is valued for its exceptional ability to inhibit oxidation and thermal degradation in various polymeric and hydrocarbon-based systems. It is a critical performance additive for manufacturers in the plastics, rubber, and lubricant industries seeking to enhance product longevity and stability under demanding conditions.

Application

• Polymer Stabilizer: Primary antioxidant for polyolefins (PP, PE), elastomers, and styrenics to prevent thermal and oxidative degradation during processing and service life.
• Rubber Industry: Used in the production of tires, hoses, and seals to protect against heat aging and maintain mechanical properties.
• Lubricant & Grease Additive: Functions as an antioxidant in industrial oils, greases, and synthetic lubricants to extend service intervals and reduce sludge formation.
• Adhesive & Sealant Formulations: Enhances the shelf-life and thermal stability of hot-melt and reactive adhesive systems.
• Fuel & Petrochemical Additive: Acts as a stabilizer in fuels and hydrocarbon streams to prevent gum and sediment formation.
• Intermediate for Further Synthesis: Serves as a key building block for the manufacture of more complex phenolic antioxidants and phosphite synergists.

Basic Information

Product Name	Thiobis[Tetrapropylenephenol]
CAS No.	68815-67-8
Molecular Formula	C30H46O2S
Molecular Weight	470.75 g/mol
Synonyms	4,4'-Thiobis(2-(1,1,3,3-tetramethylbutyl)phenol); 4,4'-Thiobis(2-tert-octylphenol); 2,2'-Thiobis(4-tert-octylphenol); Phenol, 4,4'-thiobis[2-(1,1,3,3-tetramethylbutyl)-]; Antioxidant 300; AO 300; Tetrapropylenephenol sulfide; Bis(2-tert-octyl-4-hydroxyphenyl) sulfide
EINECS	272-357-7

Quality Control

Our Thiobis[Tetrapropylenephenol] is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including assay, melting point, and color determination, to ensure it meets precise specifications for industrial and specialty applications. A Certificate of Analysis (COA) detailing all quality parameters is provided with each shipment to guarantee traceability and consistency.

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 strong oxidizing agents and heat sources.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	80 - 85 °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.