Description

Bis(2,6-Di-Ter-Butyl-4-Methylphenyl)Pentaerythritol-Diphosphite is a high-performance organophosphite antioxidant widely used to stabilize polymers against thermal and oxidative degradation. This compound matters because it effectively prevents chain scission and discoloration, thereby extending the service life and maintaining the aesthetic properties of sensitive materials. It is primarily needed by manufacturers in the plastics, synthetic fiber, and elastomer industries who require reliable processing and long-term stability for their high-value products.

Application

• Primary antioxidant and process stabilizer for polyolefins (PP, HDPE, LDPE) during extrusion and molding.
• Synergistic stabilizer in combination with phenolic antioxidants for engineering plastics like polycarbonate, polyamides, and polyesters.
• Protection of synthetic rubbers and elastomers from heat aging.
• Stabilization of adhesives and sealants to prevent gelation and maintain viscosity.
• Additive in fiber production to protect polymers during high-temperature spinning processes.
• Component in masterbatch formulations for consistent and easy dispersion of stabilizers.

Basic Information

Product Name	Bis(2,6-Di-Ter-Butyl-4-Methylphenyl)Pentaerythritol-Diphosphite
CAS No.	80693-00-1
Molecular Formula	C41H64O6P2
Molecular Weight	714.88 g/mol
Synonyms	Pentaerythritol Bis(2,6-di-tert-butyl-4-methylphenyl) Phosphite; Bis(2,6-di-tert-butyl-4-methylphenyl) Pentaerythritol Diphosphite; Pentaerythrityl Tetrakis(2,6-di-tert-butyl-4-methylphenyl) Phosphite (common misnomer); Antioxidant 626; AO 626; Ultranox 626; Irgafos 126; Phosphite stabilizer 626; 3,9-Bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane
EINECS	Contact for details

Quality Control

Our production of Bis(2,6-Di-Ter-Butyl-4-Methylphenyl)Pentaerythritol-Diphosphite adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure compliance with industry specifications for purity and performance. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Melting Point	165 - 175 °C
Volatile Matter	≤ 0.5 %
Acidity (as H3PO4)	≤ 0.1 %

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