Description

Phosphorous Acid Tris(2,4-Dinonylphenyl) Ester is a high-performance organophosphite antioxidant and stabilizer. This compound is critical for protecting polymers and synthetic materials from thermal and oxidative degradation during processing and long-term use. It is primarily utilized by manufacturers in the plastics, rubber, and lubricant industries seeking to enhance product durability and lifespan.

Application

• Primary antioxidant and stabilizer in polyolefins (PP, PE) and other polymers to prevent thermal degradation during extrusion and molding.
• Effective secondary antioxidant in combination with primary phenolic antioxidants for synergistic stabilization in engineering plastics.
• Stabilizer for synthetic lubricants and hydraulic fluids to inhibit oxidation and maintain viscosity under high-temperature operating conditions.
• Additive in adhesive and sealant formulations to prevent gelation and maintain consistency during storage and application.
• Used in the production of elastomers and synthetic rubbers to protect against heat aging and preserve mechanical properties.
• Stabilizing agent for PVC and other halogenated polymers, acting as a metal deactivator and acid scavenger.

Basic Information

Product Name	Phosphorous Acid Tris(2,4-Dinonylphenyl) Ester
CAS No.	64033-89-2
Molecular Formula	C57H93O3P
Molecular Weight	857.3 g/mol
Synonyms	Tris(2,4-dinonylphenyl) phosphite; Phosphorous acid tris(2,4-dinonylphenyl) ester; Tris(nonylphenyl) phosphite (mixed isomers); Antioxidant TNPP; TNPP; Polygard; Nonylphenyl phosphite (branched); Phosphite stabilizer 64033-89-2
EINECS	Contact for details

Quality Control

Our production of Phosphorous Acid Tris(2,4-Dinonylphenyl) Ester adheres to stringent quality management protocols. Every batch is analyzed to ensure it meets precise specifications for identity, purity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, color, acidity, and other critical parameters is provided with each shipment to guarantee consistency and reliability for your formulations.

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

Specification

Item	Specification
Appearance	Clear, pale yellow to amber viscous liquid
Identification (IR)	Conforms to structure
Assay (P content)	Min. 3.5%
Acidity (as H3PO4)	Max. 0.1%
Color (Gardner)	Max. 5
Refractive Index (n20/D)	1.520 - 1.530
Specific Gravity (20/20°C)	0.970 - 0.990
Moisture (Karl Fischer)	Max. 0.1%

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