Description

Phosphoric Acid Tris[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl] Ester is a high-performance, sterically hindered phenolic antioxidant and phosphite processing stabilizer. This compound is critically important for protecting polymers from thermal and oxidative degradation during high-temperature processing and long-term service. It is primarily needed by manufacturers in the plastics, rubber, and synthetic fiber industries seeking to enhance the durability and lifespan of their polymeric materials.

Application

• Polymer Stabilization: Acts as a highly effective processing stabilizer and antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers, preventing chain scission and discoloration.
• Synergistic Antioxidant Systems: Used in combination with primary phenolic antioxidants (e.g., Irganox 1010) to provide superior long-term thermal stability and color retention in demanding applications.
• High-Temperature Processing: Essential for stabilizing polymers during extrusion, injection molding, and other manufacturing processes that involve significant thermal stress.
• Film and Fiber Production: Protects polypropylene and polyethylene films and fibers from oxidative degradation, maintaining mechanical properties and clarity.
• Adhesives and Sealants: Enhances the thermal-oxidative stability of hot-melt adhesives and various sealant formulations.
• Masterbatch Production: A key active ingredient in antioxidant and stabilizer concentrate masterbatches for simplified and precise dosing in polymer compounding.

Basic Information

Product Name	Phosphoric Acid Tris[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl] Ester
CAS No.	17709-43-2
Molecular Formula	C42H63O6P
Molecular Weight	694.92 g/mol
Synonyms	Tris(2,4-di-tert-butylphenyl) phosphite; Irgafos 168; Antioxidant 168; Phosphorous acid, tris(2,4-di-tert-butylphenyl) ester; Hostanox PAR 24; Songnox 1680; AO-168; 2,4-Di-tert-butylphenyl phosphite; Tris(2,4-ditert-butylphenyl)phosphite
EINECS	241-709-6

Quality Control

Our production of Phosphoric Acid Tris[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl] Ester adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for assay and impurity profiling, to ensure it meets the high-purity standards required for sensitive polymer applications. Certificates of Analysis (COA) detailing purity, melting point, and specific chemical properties are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 99.0 %
Melting Point	182 - 186 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %
Solution Color (APHA)	≤ 50
Phosphorus Content	4.40 - 4.55 %

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