Description

Phosphorous Acid Tris(2-Nonylphenyl) Ester is a specialized organophosphorus compound widely recognized for its effectiveness as a stabilizer and antioxidant in polymer systems. Its primary commercial value lies in its ability to prevent thermal and oxidative degradation, thereby extending the service life and maintaining the performance of sensitive materials. This product is essential for manufacturers in the plastics, rubber, and lubricant industries seeking to enhance the durability of their formulations.

Application

• Primary antioxidant and stabilizer for polyolefins (e.g., PP, PE) to prevent thermal degradation during processing.
• Key additive in synthetic lubricants and hydraulic fluids to inhibit oxidation and sludge formation.
• Stabilizing agent for adhesives, sealants, and elastomers to improve long-term aging resistance.
• Used in the formulation of polymer masterbatches to provide consistent protective properties.
• Additive for fuel and oil to enhance oxidative stability under high-temperature conditions.
• Component in PVC and other halogenated polymer systems as a secondary stabilizer.

Basic Information

Product Name	Phosphorous Acid Tris(2-Nonylphenyl) Ester
CAS No.	16784-72-8
Molecular Formula	C45H69O3P
Molecular Weight	689.0 g/mol
Synonyms	Tris(2-nonylphenyl) Phosphite; Phosphorous Acid Tris(2-nonylphenyl) Ester; 2-Nonylphenol Phosphite (3:1); TNPP; Tris(nonylphenyl) Phosphite; Antioxidant TNPP; Stabilizer TNPP; Tris(2-nonylphenyl) Phosphite
EINECS	240-828-8

Quality Control

Our production of Phosphorous Acid Tris(2-Nonylphenyl) Ester adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against key specifications for purity, color, and acidity. A Certificate of Analysis (COA) documenting these results is provided with every shipment to support your quality assurance processes.

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 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	Clear, pale yellow to amber viscous liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Acidity (as H3PO4)	≤ 0.1%
Color (Gardner)	≤ 4
Refractive Index (n20D)	1.525 - 1.535
Density (20°C)	0.97 - 0.99 g/mL

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