Description

Triisotridecyl Phosphite is a high-performance organophosphorus compound widely utilized as a stabilizer and antioxidant in polymer systems. Its primary value lies in its ability to effectively scavenge hydroperoxides and prevent thermal and oxidative degradation, thereby extending the service life of sensitive materials. This makes it an essential additive for manufacturers in the plastics, synthetic lubricant, and specialty chemical industries seeking to enhance product durability and performance under demanding conditions.

Application

• Primary antioxidant and secondary stabilizer in polyolefins (PP, PE) and other polymers to prevent thermal degradation during processing.
• Key additive in synthetic lubricants and hydraulic fluids to improve oxidative stability and extend fluid life.
• Used as a stabilizer in PVC and other halogenated polymers to mitigate color formation and maintain mechanical properties.
• Effective hydroperoxide decomposer in elastomers and adhesives, enhancing their long-term aging resistance.
• Employed in the formulation of high-performance plasticizers and other specialty chemical intermediates.
• Functions as a synergist in combination with phenolic antioxidants to provide superior stabilization in demanding applications.

Basic Information

Product Name	Triisotridecyl Phosphite
CAS No.	77745-66-5
Molecular Formula	C39H81O3P
Molecular Weight	629.03 g/mol
Synonyms	Phosphorous Acid Triisotridecyl Ester; Isotridecyl Phosphite (mixed isomers); Tris(iso-tridecyl) Phosphite; Tris(13-methyltetradecyl) Phosphite; TITDP; Antioxidant TITDP; Weston TITDP; Phosphite Stabilizer TITDP
EINECS	Contact for details

Quality Control

Our Triisotridecyl Phosphite is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high performance. Each lot undergoes comprehensive analytical testing, including assay, color, acidity, and refractive index measurements, to confirm it meets our rigorous internal specifications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment 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). This material is hygroscopic (moisture-sensitive) and easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen) after opening to maintain product integrity. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (Titration)	≥ 95.0 %
Acidity (as H3PO4)	≤ 0.1 %
Color (APHA)	≤ 50
Refractive Index (n20/D)	1.455 - 1.465
Density (20°C)	0.89 - 0.92 g/mL
Water Content (KF)	≤ 0.1 %

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