Description

6,6'-Thiobis[2,3-Dihydro-1,1,3,3-Tetramethyl-1H-Inden-5-Ol] is a high-performance phenolic antioxidant and light stabilizer, valued for its ability to protect polymers and other sensitive materials from oxidative and photochemical degradation. Its unique molecular structure, featuring a hindered phenol linked by a thioether bridge, provides excellent compatibility and synergistic effects in complex formulations. This compound is essential for manufacturers in the polymer, rubber, and specialty chemical industries seeking to enhance the durability and lifespan of their products.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal and oxidative degradation during processing and service life.
• Synergistic Systems: Used in combination with other antioxidants (e.g., phosphites) and UV stabilizers to create highly effective stabilization packages for demanding applications.
• Adhesives and Sealants: Protects adhesive formulations from premature aging, maintaining bond strength and flexibility.
• Lubricants and Greases: Antioxidant additive in industrial lubricants and synthetic oils to extend fluid life and prevent sludge formation.
• Fuel and Petrochemical Additives: Acts as a stabilizer in fuels and hydrocarbon streams to inhibit gum and sediment formation.
• Coating Resins: Incorporated into coatings and varnishes to protect the resin binder from yellowing and embrittlement caused by light and heat.

Basic Information

Product Name	6,6'-Thiobis[2,3-Dihydro-1,1,3,3-Tetramethyl-1H-Inden-5-Ol]
CAS No.	54661-52-8
Molecular Formula	C28H38O2S
Molecular Weight	438.67 g/mol
Synonyms	6,6'-Thiobis(2,3-dihydro-1,1,3,3-tetramethyl-1H-inden-5-ol); Antioxidant 300; 2,2'-Thiobis(4-methyl-6-tert-butylphenol) derivative; 4,4'-Thiobis(2-tert-butyl-5-methylphenol) analog; Phenolic thioether antioxidant; Lowinox® 300; Ethanox® 330 related compound; Bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide derivative
EINECS	Contact for details

Quality Control

Our production of 6,6'-Thiobis[2,3-Dihydro-1,1,3,3-Tetramethyl-1H-Inden-5-Ol] adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is analyzed using advanced techniques including HPLC, GC, and IR spectroscopy to confirm identity and potency. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance 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). This material is easily oxidized (store under inert atmosphere) and light-sensitive (store away from light). Keep away from strong oxidizing agents, heat, and ignition sources. For long-term storage, consider packaging under an inert gas such as nitrogen.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	125 - 135 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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