Description

P,P',P''-[Phosphinylidynetris[[5-tert-Butyl-2-Methyl-4,1-Phenylene]Thio]]Tris[6-tert-Butyl-m-Cresol] is a high-performance, sterically hindered phenolic phosphite antioxidant. This compound is engineered to provide exceptional thermal and oxidative stability to polymers and other sensitive materials during processing and long-term service. It is a critical additive for manufacturers in the plastics, rubber, and specialty chemical industries seeking to enhance product durability and performance under demanding conditions.

Application

• Polymer Stabilization: Primary application as a highly effective antioxidant and process stabilizer in polyolefins (PP, PE), engineering plastics (ABS, PC, PA), and synthetic rubbers to prevent thermal degradation and maintain mechanical properties.
• Lubricant & Fuel Additive: Used in formulating high-performance lubricants, greases, and industrial oils to inhibit oxidation, reduce sludge formation, and extend service life.
• Adhesive & Sealant Formulations: Incorporated to prevent premature curing and degradation of adhesive polymers, ensuring consistent viscosity and bond strength.
• Elastomer Production: Protects synthetic elastomers like SBR, EPDM, and NBR from heat-induced cross-linking and chain scission during compounding and molding.
• Masterbatch & Compound Manufacturing: A key ingredient in antioxidant and stabilizer concentrate masterbatches for efficient dispersion in final polymer products.
• Wire & Cable Insulation: Enhances the long-term thermal aging resistance of polyethylene and PVC used in electrical insulation materials.

Basic Information

Product Name	P,P',P''-[Phosphinylidynetris[[5-tert-Butyl-2-Methyl-4,1-Phenylene]Thio]]Tris[6-tert-Butyl-m-Cresol]
CAS No.	73179-39-2
Molecular Formula	C69H93O3PS3
Molecular Weight	1081.65 g/mol
Synonyms	Tris(2,4-di-tert-butylphenyl) phosphite; Phosphorous acid, tris(2,4-di-tert-butylphenyl) ester; Antioxidant 168; Irgafos 168; Alkanox 240; Doverphos S-480; Tris(2,4-ditert-butylphenyl)phosphite; 2,4-Di-tert-butylphenyl phosphite
EINECS	277-357-8

Quality Control

Our production of P,P',P''-[Phosphinylidynetris[[5-tert-Butyl-2-Methyl-4,1-Phenylene]Thio]]Tris[6-tert-Butyl-m-Cresol] adheres to stringent quality management systems. Every batch is analyzed to ensure it meets precise specifications for purity, color, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee traceability and consistency for your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0 %
Melting Point	180 - 185 °C
Loss on Drying	≤ 0.5 %
2,4-Di-tert-butylphenol (HPLC)	≤ 0.3 %
Phosphorus Content	2.8 - 3.0 %
Solution Color (APHA)	≤ 50

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