Description

Triisooctyl Phosphite is a versatile organophosphorus compound widely used as a high-performance stabilizer and antioxidant in polymer processing. Its primary commercial value lies in its ability to prevent thermal and oxidative degradation, thereby extending the service life and maintaining the color of finished plastic and rubber products. This chemical is essential for manufacturers in the plastics, synthetic rubber, and lubricant additive industries seeking to enhance product durability and performance under demanding conditions.

Application

• Polymer Stabilizer: Acts as a highly effective secondary antioxidant and metal deactivator in polyolefins (e.g., PP, PE), PVC, and engineering plastics to prevent thermal degradation during processing.
• Rubber Antioxidant: Used in synthetic rubber production (e.g., SBR, BR) to inhibit oxidation and prolong the lifespan of rubber goods.
• Lubricant & Fuel Additive: Functions as an antioxidant and anti-wear agent in industrial lubricants, greases, and fuel formulations to improve stability and performance.
• Color Stabilizer: Helps prevent discoloration and yellowing in polymers exposed to heat and light, critical for consumer goods and packaging materials.
• Synergistic Agent: Often used in combination with primary phenolic antioxidants to provide superior, cost-effective stabilization.
• Intermediate for Chemical Synthesis: Serves as a key reagent in the synthesis of other phosphorus-based specialty chemicals.

Basic Information

Product Name	Triisooctyl Phosphite
CAS No.	25103-12-2
Molecular Formula	C24H51O3P
Molecular Weight	418.64 g/mol
Synonyms	Tris(2-ethylhexyl) phosphite; Phosphorous acid, tris(2-ethylhexyl) ester; Tris(2-ethylhexyl) phosphite; TOF; TiOP; Tris(isooctyl) phosphite; 2-Ethylhexyl phosphite; Antox TEP
EINECS	246-608-1

Quality Control

Our Triisooctyl Phosphite is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, color, and specific gravity, to meet exacting industry specifications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C) under an inert atmosphere (e.g., nitrogen) to prevent oxidation. Keep away from heat, sparks, and open flame. Isolate from strong oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (Titration)	≥ 95.0%
Color (APHA)	≤ 50
Specific Gravity (20/20°C)	0.885 - 0.900
Refractive Index (n20D)	1.4430 - 1.4470
Acidity (as H3PO4)	≤ 0.1%

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