Description

Bis(2-Ethylhexyl) Nonylphenyl Phosphite is a high-performance organophosphite antioxidant and stabilizer. This compound is critical for preventing oxidative degradation and maintaining the integrity of polymers and other sensitive materials during high-temperature processing and long-term use. It is an essential additive for manufacturers in the plastics, rubber, and lubricant industries seeking to enhance product durability and shelf life.

Application

• Primary antioxidant and stabilizer in polyolefins (e.g., PP, PE) to prevent thermal and oxidative degradation during processing.
• Effective color and melt flow stabilizer in engineering plastics and synthetic fibers.
• Key additive in synthetic lubricants and hydraulic fluids to inhibit oxidation and sludge formation.
• Stabilizing component in adhesive and sealant formulations to ensure consistent performance.
• Used as a co-stabilizer in PVC applications, often in combination with metal soaps.
• Protective agent in elastomer and rubber compounds to extend service life.
• Additive in hot-melt adhesives to prevent degradation during application.
• Stabilizer for polymeric materials exposed to demanding environmental conditions.

Basic Information

Product Name	Bis(2-Ethylhexyl) Nonylphenyl Phosphite
CAS No.	67859-74-9
Molecular Formula	C29H53O3P
Molecular Weight	480.70 g/mol
Synonyms	Phosphorous Acid, Bis(2-ethylhexyl) Nonylphenyl Ester; Nonylphenol Bis(2-ethylhexyl) Phosphite; Antioxidant 168 (related phosphite class); Doverphos S-686; Weston 399; Bis(2-ethylhexyl) Nonyl Phenyl Phosphite; Dioctyl Nonylphenyl Phosphite; Organophosphite Stabilizer
EINECS	Contact for details

Quality Control

Our production of Bis(2-Ethylhexyl) Nonylphenyl Phosphite adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against precise internal specifications, with key parameters including assay, color, acidity, and refractive index. 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 hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed when not in use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Clear, Colorless to Pale Yellow Liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0 %
Acidity (as H3PO4)	≤ 0.1 %
Color (APHA)	≤ 50
Refractive Index (n20D)	1.4780 - 1.4820
Density (20°C)	0.940 - 0.960 g/mL
Moisture (KF)	≤ 0.1 %

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