Description

Diphenyl Tetradecyl Phosphite is a high-performance organophosphite compound widely used as a stabilizer and antioxidant in polymer processing. Its primary value lies in its ability to effectively inhibit thermal and oxidative degradation, thereby extending the service life and maintaining the physical properties of finished polymeric materials. This product is essential for manufacturers in the plastics, rubber, and synthetic fiber industries seeking to enhance the durability and color stability of their products under demanding processing and end-use conditions.

Application

• Primary antioxidant and process stabilizer for polyolefins (PP, PE)
• Color and melt flow stabilizer in engineering plastics and synthetic fibers
• Synergistic co-stabilizer in PVC formulations and other halogenated polymers
• Stabilizer for adhesives, sealants, and synthetic rubber compounds
• Additive in lubricant and grease formulations to prevent oxidation
• Intermediate in the synthesis of other specialty phosphite antioxidants

Basic Information

Product Name	Diphenyl Tetradecyl Phosphite
CAS No.	34294-53-6
Molecular Formula	C₂₆H₃₉O₃P
Molecular Weight	430.56 g/mol
Synonyms	Phosphorous Acid, Isoteradecyl Diphenyl Ester; Tetradecyl Diphenyl Phosphite; Diphenyl Isotetradecyl Phosphite; Antioxidant TDP; Weston TDP; Hostanox® PAR 24; Irgafos® TDP; Doverphos® 253; ADK STAB 329; CAS 34294-53-6
EINECS	251-939-7

Quality Control

Our Diphenyl Tetradecyl Phosphite is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay, color, acidity, and refractive index measurements, to ensure it meets the high-purity standards required for industrial applications. Certificates of Analysis (COA) documenting these results are provided with every shipment to guarantee traceability and batch-to-batch consistency.

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 product 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)	≥ 98.0 %
Color (APHA)	≤ 50
Acidity (as H₃PO₄)	≤ 0.05 %
Refractive Index (n20D)	1.515 - 1.525
Density (20°C)	0.98 - 1.02 g/cm³

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