Description

2,6-Ditert-Butyl-4-[2-(3,5-Ditert-Butyl-4-Hydroxyphenyl)Sulfanylpropan-2-Ylsulfanyl]Phenol is a high-performance, sulfur-bridged phenolic antioxidant belonging to the class of hindered phenol thioethers. This compound matters for its superior ability to inhibit oxidative degradation and thermal aging in polymers and synthetic materials, offering enhanced long-term stability. It is primarily needed by formulators and manufacturers in the polymer, rubber, lubricant, and adhesive industries seeking to extend product service life under demanding conditions.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal-oxidative degradation during processing and end-use.
• Lubricant & Grease Additive: Used in engine oils, industrial lubricants, and greases to inhibit oxidation, reduce viscosity increase, and prevent sludge formation.
• Adhesive & Sealant Formulations: Enhances the shelf-life and durability of hot-melt adhesives, pressure-sensitive adhesives, and elastomeric sealants.
• Fuel & Petrochemical Additive: Acts as a stabilizer in fuels, hydraulic fluids, and transformer oils to prevent gum formation and oxidative breakdown.
• Synthetic Fiber Production: Protects polyamide and polyester fibers from thermal degradation during high-temperature spinning and processing.
• Synergistic Blends: Often used in combination with secondary antioxidants (e.g., phosphites) or UV stabilizers for comprehensive stabilization packages.

Basic Information

Product Name	2,6-Ditert-Butyl-4-[2-(3,5-Ditert-Butyl-4-Hydroxyphenyl)Sulfanylpropan-2-Ylsulfanyl]Phenol
CAS No.	100079-21-8
Molecular Formula	C₃₃H₅₂O₂S₂
Molecular Weight	545.88 g/mol
Synonyms	Bis[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl] Sulfide; 4,4'-Thiobis(2,6-di-tert-butylphenol); Antioxidant 300; AO 300; 2,6-Di-tert-butyl-4-[2-(3,5-di-tert-butyl-4-hydroxyphenyl)thio]propane-2-thiol]phenol; Phenol, 2,6-bis(1,1-dimethylethyl)-4-[[2-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]thio]-1-methylethyl]thio]-; Lowilite 20; Ethanox 330 (related but distinct structure).
EINECS	Contact for details

Quality Control

Our production of 2,6-Ditert-Butyl-4-[2-(3,5-Ditert-Butyl-4-Hydroxyphenyl)Sulfanylpropan-2-Ylsulfanyl]Phenol adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing key parameters such as assay, melting point, and specific impurities are provided to guarantee compliance with your technical requirements and support your own quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C/59-77°F). This material is light-sensitive and easily oxidized; prolonged exposure to air and light should be avoided. For long-term storage, consider an inert atmosphere (nitrogen blanket). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	140 - 145 °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.