Description

Bis[2-[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl]Ethyl] 3,3'-Thiobispropionate is a high-performance phenolic antioxidant and thioester synergist, widely recognized for its exceptional ability to inhibit thermal and oxidative degradation in polymers. This compound is critical for manufacturers seeking to extend the service life and maintain the physical properties of their materials under demanding conditions. It is primarily utilized in the plastics, rubber, and synthetic fiber industries to protect against polymer chain scission and discoloration.

Application

• Polymer Stabilization: Primary and secondary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal-oxidative degradation during processing and long-term use.
• Food Contact Materials: Used in polymer formulations for packaging where regulatory compliance for indirect food contact is required, subject to specific regional approvals.
• Adhesives and Sealants: Enhances the shelf-life and performance stability of hot-melt and pressure-sensitive adhesives by preventing resin oxidation.
• Elastomers and Tire Manufacturing: Protects synthetic rubber compounds (SBR, BR) in tires and industrial rubber goods from flex-cracking and aging.
• Fiber and Textile Industry: Incorporated into synthetic fibers like polypropylene to maintain tensile strength and color stability during extrusion and end-use.
• Lubricant and Fuel Additive: Acts as an antioxidant in industrial lubricants, greases, and fuels to reduce sludge formation and viscosity increase.
• Wire and Cable Insulation: Provides long-term thermal stability to polyethylene and cross-linked polyethylene (XLPE) insulation materials.

Basic Information

Product Name	Bis[2-[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl]Ethyl] 3,3'-Thiobispropionate
CAS No.	56525-25-8
Molecular Formula	C38H58O6S
Molecular Weight	642.9 g/mol
Synonyms	Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite (common misnomer); 3,3'-Thiodipropionic acid bis[2-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]ethyl] ester; Antioxidant 1035; Irganox 1035; Ethanox 398; AO-1035; 1,1'-Thiobis(2-{3,5-di-tert-butyl-4-hydroxybenzyl}ethyl) propionate; Bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamyl) sulfide
EINECS	Contact for details

Quality Control

Our production of Bis[2-[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl]Ethyl] 3,3'-Thiobispropionate adheres to stringent quality management systems. Every batch is analyzed to ensure it meets precise specifications for purity, melting point, and functional performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and consistency for your formulations.

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/59-77°F). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after initial opening to prevent moisture absorption, which can affect product performance. 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	63 - 67 °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.