Description

Tris[2-(Dodecylthio)Ethyl] Phosphite is a high-performance organophosphite antioxidant and stabilizer. This compound is valued for its ability to effectively inhibit thermal and oxidative degradation in polymer systems, thereby extending material lifespan and maintaining performance. It is primarily needed by manufacturers in the plastics, rubber, and lubricant industries seeking to enhance the durability and stability of their products under demanding conditions.

Application

• Primary antioxidant and process stabilizer for polyolefins (PP, PE) to prevent degradation during high-temperature processing.
• Synergistic co-stabilizer in combination with hindered phenolic antioxidants for enhanced long-term thermal stability in polymers.
• Stabilizer for synthetic rubbers and elastomers to prevent chain scission and cross-linking caused by heat and oxygen.
• Additive in lubricating oils and greases to control oxidation and reduce sludge formation.
• Stabilizing agent for adhesives and sealants to maintain viscosity and adhesive properties over time.
• Protective additive in PVC and other halogen-containing polymers to scavenge free radicals and HCl.

Basic Information

Product Name	Tris[2-(Dodecylthio)Ethyl] Phosphite
CAS No.	10578-66-2
Molecular Formula	C42H87O3PS3
Molecular Weight	743.3 g/mol
Synonyms	Tris(2-dodecylthioethyl) phosphite; Phosphorous acid, tris[2-(dodecylthio)ethyl] ester; Tris(2-(dodecylthio)ethyl) phosphite; Antioxidant 168 (related class); Thioether phosphite; Lauryl thioethyl phosphite; Lankromark LE65; Irgastab PS 802 (example trade names).
EINECS	Contact for details

Quality Control

Our Tris[2-(Dodecylthio)Ethyl] Phosphite is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting these results are provided as standard, ensuring traceability and batch-to-batch consistency for our customers.

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 product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) in the container headspace is recommended to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Phosphorus Content	4.0 - 4.3 %
Acidity (as H3PO4)	≤ 0.1 %
Color (APHA)	≤ 100
Density (20°C)	0.92 - 0.96 g/mL
Refractive Index (nD20)	1.480 - 1.490

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