Description

2,2'-Thiobis[4-tert-Butyl-6-Cyclopentylphenol] is a high-performance phenolic antioxidant widely used to inhibit oxidative degradation in various polymer systems. Its molecular structure provides excellent compatibility and low volatility, making it a critical additive for extending the service life and maintaining the physical properties of sensitive materials. This compound is essential for manufacturers in the plastics, rubber, and synthetic fiber industries who require reliable stabilization against heat and light-induced aging.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), polyurethanes, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Rubber Industry: Protects synthetic rubbers (SBR, NBR, EPDM) and natural rubber from scorching and aging, preserving elasticity and tensile strength.
• Adhesives & Sealants: Enhances the shelf-life and durability of hot-melt and pressure-sensitive adhesives by preventing resin oxidation.
• Synthetic Fibers: Incorporated into nylon, polyester, and polypropylene fibers to protect against UV and thermal degradation, maintaining color and strength.
• Lubricants & Greases: Serves as an antioxidant additive in industrial lubricants and greases to reduce sludge formation and viscosity increase.
• Fuel & Oil Additives: Used in fuel and lubricant formulations to inhibit gum formation and oxidative breakdown.
• Elastomers & Latex: Stabilizes synthetic latexes and elastomeric compounds against discoloration and embrittlement.
• Masterbatch Production: A key component in antioxidant and stabilizer concentrate masterbatches for efficient dispersion in final polymer products.

Basic Information

Product Name	2,2'-Thiobis[4-tert-Butyl-6-Cyclopentylphenol]
CAS No.	55036-39-0
Molecular Formula	C30H44O2S
Molecular Weight	468.74 g/mol
Synonyms	2,2'-Thiobis(4-tert-butyl-6-cyclopentylphenol); Phenol, 2,2'-thiobis[4-(1,1-dimethylethyl)-6-cyclopentyl-; Antioxidant 300; AO 300; Bis(4-tert-butyl-6-cyclopentyl-2-hydroxyphenyl) sulfide; 4,4'-Thiobis(2-cyclopentyl-6-tert-butylphenol); Lowilite 300; Phenolic Sulfide Antioxidant
EINECS	Contact for details

Quality Control

Our production of 2,2'-Thiobis[4-tert-Butyl-6-Cyclopentylphenol] adheres to a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use in sensitive polymer applications. Certificates of Analysis (COA) are provided with each shipment, and we support compliance with relevant global regulatory frameworks.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is easily oxidized and should be kept under an inert atmosphere (e.g., nitrogen) for long-term storage. 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	125°C - 135°C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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