Description

Phosphoric Acid Tris[2-[[2-Hydroxy-3-(tert-Butyl)-5-Methylphenyl]Methyl]-4-Methyl-6-(tert-Butyl)Phenyl] Ester is a high-performance, sterically hindered phenolic antioxidant and phosphite processing stabilizer. This compound matters for its superior ability to prevent thermal and oxidative degradation in polymers, thereby extending material lifespan and maintaining critical physical properties during high-temperature processing. It is essential for manufacturers in the plastics, rubber, and specialty chemical industries who require robust stabilization solutions for sensitive polymeric materials.

Application

• Primary antioxidant and processing stabilizer for polyolefins (PP, HDPE, LDPE).
• Stabilization of engineering plastics and styrenic polymers against thermal degradation.
• Protection of synthetic rubbers and elastomers from oxidative aging.
• Additive in adhesive and sealant formulations to enhance shelf-life and processing stability.
• Stabilizer component in lubricants and greases to inhibit oxidation and viscosity change.
• Used in the production of masterbatches and polymer concentrates for consistent additive delivery.

Basic Information

Product Name	Phosphoric Acid Tris[2-[[2-Hydroxy-3-(tert-Butyl)-5-Methylphenyl]Methyl]-4-Methyl-6-(tert-Butyl)Phenyl] Ester
CAS No.	53051-19-7
Molecular Formula	C78H108O6P
Molecular Weight	1181.66 g/mol
Synonyms	Tris(2,4-di-tert-butylphenyl) phosphite; Irgafos 168; Phosphorous acid tris(2,4-di-tert-butylphenyl) ester; Antioxidant 168; AO 168; Hostanox PAR 24; Alkanox 240; Doverphos S-480; 2,4-Di-tert-butylphenyl phosphite (tris); Tris(2,4-bis(1,1-dimethylethyl)phenyl) phosphite
EINECS	Contact for details

Quality Control

Our production of Phosphoric Acid Tris[2-[[2-Hydroxy-3-(tert-Butyl)-5-Methylphenyl]Methyl]-4-Methyl-6-(tert-Butyl)Phenyl] Ester adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. The material is manufactured under a GMP-compliant quality management system and is compliant with global regulations including REACH. Certificates of Analysis (COA) detailing purity, identity, and key physical parameters are provided with every shipment to guarantee it meets your specific application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and easily oxidized; therefore, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to prevent degradation and moisture absorption. Keep away from strong acids and strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	182 - 186 °C
Loss on Drying	≤ 0.5 %
Acidity (as H3PO4)	≤ 0.1 %
2,4-Di-tert-butylphenol (HPLC)	≤ 0.3 %

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