Description

Triphenyl Phosphite is a versatile organophosphorus compound widely used as a critical intermediate and stabilizer in industrial chemistry. Its primary value lies in its ability to act as a highly effective antioxidant and chelating agent, protecting materials from degradation. This makes it essential for manufacturers in the polymer, agrochemical, and lubricant industries seeking to enhance product longevity and performance under demanding conditions.

Application

• Polymer Stabilizer: Acts as a secondary antioxidant and metal deactivator in polyolefins (e.g., PP, PE), PVC, and engineering plastics to prevent thermal and oxidative degradation during processing and service life.
• Chemical Intermediate: Serves as a key building block in the synthesis of organophosphorus ligands, flame retardants, and other specialty chemicals.
• Lubricant & Grease Additive: Functions as an anti-wear and extreme pressure (EP) additive, as well as an antioxidant, in synthetic lubricants and industrial greases.
• Agrochemical Synthesis: Used in the production of certain pesticides and insecticides as a phosphorylating agent.
• Epoxy Resin Modifier: Employed to modify the properties of epoxy resin systems, improving flexibility and adhesion.
• Rubber Antioxidant: Provides protection against oxidation and heat aging in synthetic rubber compounds.

Basic Information

Product Name	Triphenyl Phosphite
CAS No.	101-02-0
Molecular Formula	C18H15O3P
Molecular Weight	310.28 g/mol
Synonyms	Triphenyl Phosphite; Phosphorous Acid Triphenyl Ester; Triphenoxyphosphine; Phenyl Phosphite; TPP; TPPi; NSC 40358; Phosphorotrithious Acid Triphenyl Ester
EINECS	202-908-4

Quality Control

Our Triphenyl Phosphite is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, color, and other critical parameters. A detailed Certificate of Analysis (COA) is provided with each shipment, guaranteeing traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials such as strong oxidizing agents. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Acidity (as H3PO3)	≤ 0.5%
Color (APHA)	≤ 50
Water Content (KF)	≤ 0.1%
Refractive Index (n20D)	1.588 - 1.592
Density (20°C)	1.180 - 1.190 g/cm³

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