Description

Phosphorous Acid Tris[4-(α-Methylbenzyl)Phenyl] Ester is a specialized organophosphorus compound designed for high-performance applications. This chemical is valued for its role as an advanced intermediate and additive, offering unique chemical functionality. It is primarily utilized in the synthesis of specialty polymers, as a stabilizer in high-temperature formulations, and in the production of advanced lubricant additives. Industrial R&D and manufacturing sectors seeking tailored phosphite-based solutions will find this product essential.

Application

• As a key intermediate in the synthesis of high-performance antioxidants and phosphite stabilizers for polymers.
• As a specialized additive in advanced lubricant and grease formulations to enhance thermal and oxidative stability.
• In the production of specialty chemicals and fine chemicals requiring a bulky, sterically hindered phosphite structure.
• For research and development in novel catalyst systems and ligand design for organic synthesis.
• As a potential stabilizing agent in specialty coatings and adhesives requiring resistance to degradation.
• In the formulation of functional fluids for demanding industrial and automotive applications.

Basic Information

Item	Detail
Product Name	Phosphorous Acid Tris[4-(α-Methylbenzyl)Phenyl] Ester
CAS No.	2677-30-7
Molecular Formula	C48H45O3P
Molecular Weight	700.84 g/mol
Synonyms	Tris[4-(α-methylbenzyl)phenyl] phosphite; Tris(4-(1-phenylethyl)phenyl) phosphite; Phosphorous acid tris(4-(1-phenylethyl)phenyl) ester; Tris(4-(α-methylbenzyl)phenyl) phosphite; P,P,P-Tris[4-(1-phenylethyl)phenyl] phosphorous acid ester; Irgafos® P-EPQ (related trade series); Antioxidant P-EPQ; Tris(4-cumylphenyl) phosphite (related structure)
EINECS	Contact for details

Quality Control

Our Phosphorous Acid Tris[4-(α-Methylbenzyl)Phenyl] Ester is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with key specifications upon request, supporting your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and easily oxidized; it is recommended to store under an inert atmosphere such as nitrogen for long-term preservation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or flakes
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	95 - 105 °C
Loss on Drying	≤ 0.5%

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