Description

Diphenyl Tridecyl Phosphite is an organophosphorus compound widely utilized as a high-performance stabilizer and antioxidant. Its primary value lies in its ability to effectively inhibit thermal and oxidative degradation in various polymer systems, thereby extending product lifespan and maintaining material properties. This chemical is essential for manufacturers in the plastics, rubber, and lubricant industries seeking to enhance the durability and performance of their formulations.

Application

• Primary antioxidant and stabilizer in polyolefins (e.g., PP, PE) to prevent thermal degradation during processing and use.
• Key additive in synthetic lubricants and hydraulic fluids to improve oxidative stability and reduce sludge formation.
• Stabilizing agent for elastomers and synthetic rubbers, protecting against heat and oxygen-induced cracking.
• Co-stabilizer in PVC formulations, often used in combination with other stabilizers to enhance long-term heat stability.
• Additive in adhesive and sealant chemistries to prevent gelation and maintain viscosity.
• Intermediate in the synthesis of more complex phosphorus-based specialty chemicals.

Basic Information

Product Name	Diphenyl Tridecyl Phosphite
CAS No.	60628-17-3
Molecular Formula	C25H37O3P
Molecular Weight	416.53 g/mol
Synonyms	Phosphorous Acid, Isotridecyl Diphenyl Ester; Isotridecyl Diphenyl Phosphite; Diphenyl Isotridecyl Phosphite; Tridecyl Diphenyl Phosphite; Antioxidant TDP; Stabilizer TDP; Doverphos® 7 (Trade Name); Weston® TDP (Trade Name)
EINECS	262-291-3

Quality Control

Our Diphenyl Tridecyl Phosphite is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including assay, color, and acidity determination, to ensure it meets precise specifications for industrial applications. Certificates of Analysis (COA) documenting purity and key physical-chemical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong bases and incompatible materials such as strong oxidizing agents. The product is stable under recommended storage conditions.

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)	1.515 - 1.525
Density (20°C)	1.00 - 1.05 g/cm³

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