Description

Isodecyl 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 oxidative degradation and prevent discoloration in sensitive polymer systems. This makes it an essential additive for manufacturers in the plastics, synthetic fiber, and lubricant industries seeking to enhance product longevity and performance under demanding conditions.

Application

• Primary antioxidant and process stabilizer for polyolefins (PP, PE) and engineering plastics (PC, ABS).
• Color stabilizer and co-stabilizer in PVC and other halogenated polymer formulations.
• Synergistic additive in combination with phenolic antioxidants and phosphites for enhanced polymer protection.
• Stabilizer component in synthetic lubricants and industrial greases to prevent oxidation and viscosity change.
• Intermediate in the synthesis of other specialty organophosphorus compounds.
• Additive in adhesive and sealant formulations to improve thermal aging resistance.

Basic Information

Product Name	Isodecyl Diphenyl Phosphite
CAS No.	26544-23-0
Molecular Formula	C22H31O3P
Molecular Weight	374.45 g/mol
Synonyms	Phosphorous Acid, Isodecyl Diphenyl Ester; Diphenyl Isodecyl Phosphite; Isodecyloxy(diphenoxy)phosphine; Doverphos® 295; Weston® 491; Antioxidant 295; IDDP; Isodecyl Diphenyl Phosphite (IDDP)
EINECS	247-777-1

Quality Control

Our Isodecyl Diphenyl Phosphite is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, acidity, and other critical parameters is provided with every shipment to guarantee consistency and compliance with industry standards.

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 easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., nitrogen blanket) is recommended to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Acidity (as H3PO4)	≤ 0.1 %
Color (APHA)	≤ 50
Refractive Index (n20D)	1.525 - 1.535
Density (20°C)	1.04 - 1.06 g/mL

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