Antioxidant 626

Chemical Name: 3,9-bis(2,4-bis(1,1-dimethylethyl)phenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane

CAS No.：26741-53-7

Chemical Formula: C33H50O6P2

EINECS No.: 247-952-5 

Synonyms：Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite，3,9-Bis(2,4-bis(1,1-dimethylethyl)phenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane，ADK Stab PEP 24，Mark PEP 24，Ultranox 626，Irgafos 126，Primanox626

Description：

• High-performance phosphite secondary antioxidant, helps to protect the color of polymers.

• Generally not used alone, often combined with phenolic main antioxidants such as antioxidant 1010, improves the thermal stability of polymers in processing.

Typical Properties：

Appearance：White powder

Assay：95.0% min

Melting point：160.0-180.0℃

Volatile：1.00% max

Acid value：1.00 mg KOH/g max

Applications：

• After compounding, it is widely used in PE, PP, PS, polyamide, polycarbonate, ABS and other polymer materials. 

 • Concentration：0.1-0.5%

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