Description

Diisotridecyl Phenyl Phosphite is a high-performance organophosphite antioxidant and secondary stabilizer. This compound is critical for protecting polymers and synthetic materials from oxidative degradation and thermal stress during processing and long-term use. It is an essential additive for manufacturers in the plastics, rubber, and lubricant industries seeking to enhance product durability and lifespan.

Application

• Primary and secondary antioxidant in polyolefins (PP, PE) and other polymers.
• Stabilizer for PVC and other halogen-containing polymers to prevent color change and maintain physical properties.
• Additive in synthetic lubricants and hydraulic fluids to improve oxidative stability and reduce sludge formation.
• Processing stabilizer in engineering plastics and thermoplastic elastomers (TPEs).
• Co-stabilizer in adhesive and sealant formulations to prevent gelation and maintain viscosity.
• Protective agent in rubber compounds to extend service life under heat and mechanical stress.

Basic Information

Product Name	Diisotridecyl Phenyl Phosphite
CAS No.	67874-37-7
Molecular Formula	C44H83O3P
Molecular Weight	667.1 g/mol
Synonyms	Phenol, diisotridecyl phosphite; Diisotridecyl phosphite phenyl ester; Phosphorous acid, diisotridecyl phenyl ester; DTDPP; Phenyl diisotridecyl phosphite; Antioxidant DTDPP; Weston DTDPP; Doverphos DTDPP
EINECS	Contact for details

Quality Control

Our Diisotridecyl 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 phosphite content. Certificates of Analysis (COA) documenting key 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). This material is hygroscopic (moisture-sensitive) and should be kept under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and oxidation.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (Phosphite Content)	≥ 97.0 %
Color (APHA)	≤ 50
Acidity (as H3PO4)	≤ 0.05 %
Moisture (KF)	≤ 0.1 %
Refractive Index (n20D)	1.4750 - 1.4850
Density (20°C)	0.930 - 0.950 g/cm³

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