Description

Octyl Diphenyl Phosphite is a versatile organophosphorus compound widely used as a high-performance stabilizer and antioxidant. Its primary value lies in its ability to effectively inhibit thermal and oxidative degradation, thereby extending the service life of sensitive materials. This product is essential for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance product durability and performance under demanding conditions.

Application

• Primary antioxidant and stabilizer in polyolefins (e.g., PP, PE), PVC, and other polymers to prevent thermal degradation during processing and use.
• Key additive in synthetic lubricants and hydraulic fluids to improve oxidative stability and prevent sludge formation.
• Used as a co-stabilizer in combination with primary antioxidants (e.g., hindered phenols) for synergistic effects in high-temperature applications.
• Effective color stabilizer in polymers, helping to maintain clarity and prevent yellowing.
• Intermediate in the synthesis of more complex phosphite-based antioxidants and flame retardants.
• Functional additive in adhesives, sealants, and elastomers to enhance aging resistance.

Basic Information

Product Name	Octyl Diphenyl Phosphite
CAS No.	3164-55-4
Molecular Formula	C20H27O3P
Molecular Weight	346.40 g/mol
Synonyms	Phosphorous Acid, Dioctyl Phenyl Ester; Diphenyl Octyl Phosphite; Dioctyl Phenyl Phosphite; Octyl Diphenylphosphite; ODPP; Antioxidant ODPP; Stabilizer ODPP; Phenyl Dioctyl Phosphite
EINECS	221-622-6

Quality Control

Our Octyl Diphenyl Phosphite is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color, and acidity. Certificates of Analysis (COA) documenting key parameters are provided to guarantee consistency, traceability, and compliance with your technical requirements.

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); containers must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Acidity (as H3PO4)	≤ 0.1 %
Color (APHA)	≤ 50
Moisture (KF)	≤ 0.1 %
Refractive Index (n20D)	1.525 - 1.535
Density (20°C)	1.04 - 1.08 g/mL

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