Description

Phosphorous Acid Tris(4-Methylphenyl) Ester is a specialized organophosphorus compound that serves as a versatile intermediate and functional additive. This chemical is valued for its ability to impart specific properties, such as flame retardancy or plasticization, in advanced polymer formulations. It is primarily sought by manufacturers in the polymer, specialty chemical, and material science industries for research, development, and production applications.

Application

• As a key intermediate in the synthesis of advanced flame retardants for engineering plastics and resins.
• Utilized as a plasticizer or stabilizer additive in specialty polymer systems to modify physical properties.
• Employed in research and development for creating novel organophosphorus ligands or catalysts.
• Potential use as a component in the formulation of high-performance lubricants or hydraulic fluids.
• Serves as a building block in agrochemical and pharmaceutical synthesis for specialized active ingredients.
• Applied in material science for surface modification or as a cross-linking agent in specific coatings.

Basic Information

Product Name	Phosphorous Acid Tris(4-Methylphenyl) Ester
CAS No.	620-42-8
Molecular Formula	C21H21O3P
Molecular Weight	352.36 g/mol
Synonyms	Tris(p-tolyl) Phosphite; Phosphorous Acid Tris(p-Tolyl) Ester; Tris(4-Methylphenyl) Phosphite; Tris(p-Methylphenyl) Phosphite; P,P,P-Tris(4-methylphenyl) Phosphorous Acid Triester; 4-Methylphenyl Phosphite (3:1); TOF
EINECS	210-648-6

Quality Control

Our Phosphorous Acid Tris(4-Methylphenyl) Ester is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure high purity and consistent performance. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your specifications.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Free p-Cresol	≤ 1.0%
Acidity (as H3PO3)	≤ 0.1%

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