Description

Didecyl Phenyl Phosphite is a high-performance organophosphite antioxidant and secondary stabilizer. This compound is valued for its effectiveness in preventing oxidative degradation and maintaining the color and physical properties of polymers during high-temperature processing and long-term use. It is a critical additive for manufacturers in the plastics, synthetic fiber, and lubricant industries seeking to enhance product durability and lifespan.

Application

• Primary and secondary antioxidant in polyolefins (PP, PE) and other polymers.
• Color and melt flow stabilizer for engineering plastics during extrusion and molding.
• Synergistic co-stabilizer in combination with primary phenolic antioxidants for enhanced performance.
• Stabilizer for synthetic fibers to prevent thermal and oxidative degradation.
• Additive in lubricant and grease formulations to improve oxidative stability.
• Stabilizing agent for adhesives and sealants.
• Intermediate in the synthesis of other specialty phosphite compounds.

Basic Information

Product Name	Didecyl Phenyl Phosphite
CAS No.	1254-78-0
Molecular Formula	C26H47O3P
Molecular Weight	438.62 g/mol
Synonyms	Phosphorous Acid, Didecyl Phenyl Ester; Phenol, Didecyl Phosphite; Didecyl Phenyl Phosphite; Phenyl Didecyl Phosphite; Antioxidant 232; Weston PDDP; Doverphos S-680; Doverphos 675; Hostanox PAR 24; Ultranox 626
EINECS	215-001-6

Quality Control

Our Didecyl Phenyl 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 reliability for your production 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 easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy. Keep away from strong oxidizing agents.

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)	1.4750 - 1.4850
Density (20°C)	0.930 - 0.950 g/mL

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