Description

Tris(3-tert-Butyl-4-Hydroxyphenyl) Phosphate is a high-performance phenolic antioxidant and phosphite processing stabilizer, offering exceptional protection against thermal and oxidative degradation in polymer systems. Its unique molecular structure provides superior color retention and long-term stability, making it a critical additive for demanding applications. This compound is essential for manufacturers in the plastics, rubber, and synthetic fiber industries seeking to enhance the durability and lifespan of their products.

Application

• Polymer Stabilization: Primary antioxidant and secondary phosphite stabilizer in polyolefins (PP, PE), engineering plastics (ABS, PC, PA), and synthetic rubbers to prevent thermal-oxidative degradation during processing and end-use.
• Color Protection: Effectively minimizes yellowing and discoloration in sensitive polymers, particularly in applications requiring high aesthetic quality like packaging films and fibers.
• Synergistic Formulations: Used in combination with other antioxidants (e.g., hindered phenols, thioesters) to create synergistic stabilization packages for enhanced performance.
• Lubricant & Fuel Additive: Acts as an antioxidant in industrial lubricants, greases, and transformer oils to extend service life and maintain viscosity.
• Adhesive & Sealant Production: Improves the thermal aging resistance of hot-melt adhesives, sealants, and other polymer-based formulations.
• Wire & Cable Insulation: Provides long-term thermal stability to the polymer insulation and jacketing materials used in electrical cables.

Basic Information

Product Name	Tris(3-tert-Butyl-4-Hydroxyphenyl) Phosphate
CAS No.	21214-39-1
Molecular Formula	C30H39O6P
Molecular Weight	526.60 g/mol
Synonyms	Tris(3-tert-butyl-4-hydroxyphenyl) phosphite; Phosphorous acid tris(3-tert-butyl-4-hydroxyphenyl) ester; Irgafos® 168 (Oxidation Product); Antioxidant 168; AO-168; Tris(2-tert-butyl-4-hydroxy-5-methylphenyl)phosphite (related isomer); TBPP; 3,3',3''-Phosphorous acid tris(5-tert-butyl-4-hydroxy-2-methylphenyl) ester
EINECS	244-255-4

Quality Control

Our Tris(3-tert-Butyl-4-Hydroxyphenyl) Phosphate is manufactured under a stringent quality management system. Every batch is tested to ensure it meets high-purity specifications for use as a polymer additive. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with each shipment to guarantee batch-to-batch consistency and performance reliability.

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 hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Melting Point	183 - 187 °C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%

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