Description

Bis(2-Ethylhexyl) Phenyl Phosphite is a high-performance organophosphite antioxidant and secondary stabilizer. This compound is valued for its ability to effectively decompose hydroperoxides and chelate metal ions, thereby preventing oxidative degradation and color formation in sensitive materials. It is an essential additive for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance the long-term thermal stability and color retention of their products.

Application

• Polymer Stabilization: A key secondary antioxidant in polyolefins (PP, PE), PVC, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Lubricant & Fuel Additive: Functions as an antioxidant and metal deactivator in synthetic lubricants, greases, and industrial oils to extend service life.
• Rubber Industry: Used as a non-staining stabilizer in synthetic rubbers to protect against heat aging and maintain elasticity.
• Adhesive & Sealant Formulations: Enhances the thermal stability and prevents gelation in hot-melt adhesives and polysulfide-based sealants.
• Color Stabilizer: Inhibits yellowing and discoloration in clear polymers and coatings, maintaining optical clarity.
• Synergistic Blends: Often used in combination with primary phenolic antioxidants (e.g., Irganox 1010) for superior stabilization performance.

Basic Information

Product Name	Bis(2-Ethylhexyl) Phenyl Phosphite
CAS No.	3164-60-1
Molecular Formula	C22H39O3P
Molecular Weight	382.51 g/mol
Synonyms	Phenyl Di(2-ethylhexyl) Phosphite; Dioctyl Phenyl Phosphite; Phosphorous Acid, Phenyl Bis(2-ethylhexyl) Ester; Weston ODPP; Doverphos ODPP; Antioxidant ODPP; Bis(2-ethylhexyl) Phenyl Phosphite; Phenyl Di(octyl) Phosphite
EINECS	221-622-8

Quality Control

Our Bis(2-Ethylhexyl) Phenyl Phosphite is manufactured under strict quality management systems. Every batch is analyzed to ensure it meets precise chemical and physical specifications, including purity, color, and acid value. A comprehensive Certificate of Analysis (COA) detailing these results is provided with each shipment to guarantee consistency and performance 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 product is hygroscopic (moisture-sensitive) and easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen) after opening to maintain optimal quality.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Acid Value	≤ 0.5 mg KOH/g
Color (APHA)	≤ 50
Refractive Index (20°C)	1.4750 - 1.4850
Density (20°C)	0.940 - 0.960 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.