High Quality/Bis(2.4-di-t-butylphenyl) Pentaerythritol Diphosphite CAS NO.26741-53-7

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Ultranox 626

Chemical name: Bis(2.4-di-t-butylphenyl) Pentaerythritol Diphosphite

CAS: 26741-53-7 

Assay: 95% min.

Appearance: White powder

Volatile matter; 1.0% max

Acid value (mgKOH/g) : 1.0% max

Free 2.4-di-tert-butyl-phenol: 1.0% max.

Melting point: 170-180℃.

 Properties:

  This product soluble in organic solvents like toluene, dichloromethane, and slightly soluble in alcohols, but insoluble in water. Flash point: 168℃, kindling point: 421℃, lower limit concentration of dust explosion: 0.12Kg/m3.

Applications：

  The product is a kind of high-effective solid phosphite ester antioxidant, which is superior to other phosphite ester in the effective protection of polymers’ color. It is often blended with phenolic principal antioxidant to prepare composite antioxidant which improves the thermo-stability of polymer processing, thus making it widely applied in PE, PP, PS, PA, PC, ABS and many other polymer materials.