Description

Phosphorous Acid Tris(2-Ethylhexyl) Ester is a high-purity organophosphorus compound widely used as a key intermediate and additive in advanced chemical synthesis. Its primary commercial value lies in its role as a versatile ligand and stabilizer, offering excellent chelating properties and resistance to hydrolysis. This product is essential for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance product performance and stability under demanding conditions.

Application

• As a stabilizer and antioxidant in polyvinyl chloride (PVC) and other polymer systems to prevent thermal degradation.
• As a chelating agent and extractant in hydrometallurgy for the separation and purification of metal ions.
• As a key intermediate in the synthesis of more complex organophosphorus compounds, including flame retardants and plasticizers.
• As an additive in lubricants and functional fluids to improve anti-wear and extreme pressure properties.
• As a corrosion inhibitor in industrial fluid formulations.
• In the production of specialty surfactants and surface treatment agents.

Basic Information

Product Name	Phosphorous Acid Tris(2-Ethylhexyl) Ester
CAS No.	301-13-3
Molecular Formula	C24H51O3P
Molecular Weight	418.64 g/mol
Synonyms	Tris(2-ethylhexyl) Phosphite; 2-Ethylhexyl Phosphite; Phosphorous Acid Tri(2-ethylhexyl) Ester; TOF; Tris(2-ethylhexyl) Phosphite; Trioctyl Phosphite; Phosphorous Acid Trioctyl Ester; Tris(2-ethylhexyl) Hydrogen Phosphite
EINECS	206-108-6

Quality Control

Our Phosphorous Acid Tris(2-Ethylhexyl) Ester is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets the high standards required for industrial and specialty applications. A Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with each shipment to guarantee traceability and 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 material is easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation to maintain optimal quality. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 95.0%
Acidity (as H3PO3)	≤ 0.5%
Color (APHA)	≤ 50
Moisture (KF)	≤ 0.1%
Specific Gravity (20°C)	0.885 - 0.900
Refractive Index (20°C)	1.450 - 1.455

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