Description

Diisodecyl Phenyl Phosphite is a high-performance organophosphite antioxidant and secondary stabilizer. This compound is critical for preventing oxidative degradation and maintaining the physical properties of polymers during high-temperature processing and long-term use. It is an essential additive for manufacturers in the plastics, synthetic rubber, and lubricant industries seeking to enhance product durability and shelf life.

Application

• Primary and secondary antioxidant in polyolefins (PP, PE) and engineering plastics.
• Stabilizer in synthetic rubbers and elastomers to prevent chain scission and cross-linking.
• Additive in industrial lubricants and greases to inhibit oxidation and sludge formation.
• Co-stabilizer in PVC formulations, often used in combination with metal soaps.
• Processing stabilizer for adhesives, sealants, and polymer resins.
• Protective agent in hot-melt adhesives and coating systems.

Basic Information

Product Name	Diisodecyl Phenyl Phosphite
CAS No.	25550-98-5
Molecular Formula	C26H47O3P
Molecular Weight	438.62 g/mol
Synonyms	Phosphorous Acid, Diisodecyl Phenyl Ester; Phenyl Diisodecyl Phosphite; DIDP; Antioxidant 619; Doverphos® 7; Weston® PDDP; Phosphite Stabilizer DIDP; Di(isodecyl)phenyl Phosphite; 2,6-Di-tert-butyl-4-methylphenyl Diisodecyl Phosphite (related trade blends)
EINECS	247-098-0

Quality Control

Our Diisodecyl Phenyl Phosphite is manufactured under a strict quality management system. Every batch is analyzed to ensure it meets precise chemical and physical specifications, including assay, color, acidity, and refractive index. A comprehensive Certificate of Analysis (COA) documenting 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 15-25°C. This material is hygroscopic (moisture-sensitive) and easily oxidized; for long-term storage, keeping the container under an inert atmosphere (e.g., 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 to structure
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 (Karl Fischer)	≤ 0.1 %

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