Description

2-Ethylhexyl Bis(Nonylphenyl) Phosphite is a specialized organophosphite compound widely utilized as a high-performance secondary antioxidant and process stabilizer. Its primary value lies in its ability to effectively decompose hydroperoxides, thereby preventing polymer degradation and extending the service life of sensitive materials. This product is essential for manufacturers in the plastics, synthetic rubber, and lubricant industries seeking to enhance the thermal stability and color retention of their formulations.

Application

• Polymer Stabilization: Acts as a secondary antioxidant in polyolefins (PP, PE), PVC, polycarbonates, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Synthetic Rubber Production: Used as a stabilizer in the manufacture of SBR, BR, and NBR to protect against polymer chain scission and maintain elastomeric properties.
• Lubricant & Grease Additive: Functions as an antioxidant in industrial lubricants and synthetic greases to inhibit sludge formation and viscosity increase.
• Adhesive & Sealant Formulations: Incorporated to improve the heat aging resistance and long-term durability of hot-melt and reactive adhesives.
• Color Protection: Helps prevent yellowing and discoloration in clear and lightly colored plastic articles and films.
• Synergistic Blends: Often used in combination with primary phenolic antioxidants (e.g., BHT, Irganox) to provide comprehensive stabilization with a synergistic effect.

Basic Information

Product Name	2-Ethylhexyl Bis(Nonylphenyl) Phosphite
CAS No.	55062-09-4
Molecular Formula	C44H65O3P
Molecular Weight	672.96 g/mol
Synonyms	Bis(nonylphenyl) 2-ethylhexyl phosphite; Phosphorous acid, bis(nonylphenyl) 2-ethylhexyl ester; 2-Ethylhexyl di(nonylphenyl) phosphite; Antioxidant TNPP (related phosphite type); Weston OPS; Doverphos S-686; Organophosphite stabilizer; Nonylphenyl phosphite derivative
EINECS	259-467-5

Quality Control

Our production of 2-Ethylhexyl Bis(Nonylphenyl) Phosphite adheres to stringent quality management protocols. Each batch is analyzed to ensure consistent purity, performance, and compliance with relevant industry specifications. Certificates of Analysis (COA) detailing assay, color, acidity, and refractive index are provided to guarantee traceability and product integrity for 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 hygroscopic (moisture-sensitive) and should be kept under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and oxidation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Clear, pale yellow to amber liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0 %
Acidity (as Phosphorous Acid)	≤ 0.1 %
Color (APHA)	≤ 100
Refractive Index (n20/D)	1.520 - 1.530
Density (20°C)	0.970 - 0.990 g/mL
Moisture (Karl Fischer)	≤ 0.1 %

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