Description

Phosphorous Acid Trioleyl Ester is a high-purity organophosphorus compound, specifically the triester of phosphorous acid and oleyl alcohol. This specialty chemical serves as a highly effective stabilizer and antioxidant in polymer systems, offering superior protection against thermal and oxidative degradation. It is primarily utilized by manufacturers in the plastics, lubricant, and synthetic fiber industries seeking to enhance the longevity and performance of their products under demanding conditions.

Application

• Polymer Stabilizer: Acts as a secondary antioxidant and metal deactivator in polyolefins (e.g., PP, PE), PVC, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Lubricant & Grease Additive: Functions as an anti-wear and extreme pressure (EP) additive, as well as an antioxidant, in synthetic and industrial lubricants and greases.
• Synthetic Fiber Processing Aid: Used as a spin finish component and stabilizer to protect synthetic fibers like polyester and nylon from heat-induced damage during high-speed production.
• Rubber Antioxidant: Imparts antioxidant properties to synthetic rubber compounds, helping to maintain elasticity and prevent cracking.
• Metalworking Fluid Additive: Provides corrosion inhibition and stability in water-based and oil-based metalworking fluid formulations.
• Intermediate for Specialty Chemicals: Serves as a key building block in the synthesis of other phosphorus-based additives, such as phosphites and phosphonates.

Basic Information

Product Name	Phosphorous Acid Trioleyl Ester
CAS No.	13023-13-7
Molecular Formula	C54H105O3P
Molecular Weight	833.4 g/mol
Synonyms	Tris(oleyl) Phosphite; Trioleyl Phosphite; Phosphorous Acid Tris(9-octadecenyl) Ester; Oleyl Phosphite; Tris(9-Octadecen-1-yl) Phosphite; (Z)-Phosphorous Acid Tris(9-Octadecenyl) Ester; TOF; Antioxidant TOF
EINECS	235-873-5

Quality Control

Our Phosphorous Acid Trioleyl Ester is manufactured under strict quality management protocols. Every batch undergoes comprehensive analytical testing to ensure it meets stringent purity and performance specifications. We provide full traceability and a detailed Certificate of Analysis (COA) with each shipment, confirming identity, assay, and key physical parameters. Our quality system is designed to support customer needs for REACH compliance and consistent product performance in demanding industrial applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 15-25°C (59-77°F). This material 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 and heat sources.

Specification

Item	Specification
Appearance	Clear, pale yellow to amber viscous liquid
Identification (IR)	Conforms to structure
Assay (P Content)	≥ 96.0%
Acid Value	≤ 1.0 mg KOH/g
Color (Gardner)	≤ 5
Moisture (Karl Fischer)	≤ 0.1%
Refractive Index (n20D)	1.465 - 1.475
Density (20°C)	0.890 - 0.910 g/mL

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