Weston 618/619, CAS 3806-34-6, Antioxidant 618/619

Chemical Name:

O,O’-Dioctadecylpentaerythritol bis(phosphite)

Formula C41H82O6P2
Molecular Weight 733.04
CAS# 3806-34-6

Synonym name:

Weston 618, Weston 619F


Appearance White powder
Ash Max.0.10%
Melting point 37.0-46.0℃
Solubility(20℃) Water <0.1
MeoH 2.1
EtoH U
Acetone 0.3
Ch2Cl2 20
Hexane 25


>Antioxidant 618, also known as antioxidant 619, is a solid phosphite antioxidant that provides color stability, reduces polymer degradation, and improves gas fading per­formance in many resins, better than antioxidant 168.

> antioxidant 618 is mainly used in ABS resin compounding, and the rest used in ABS modification. Together with antioxidant CPL.

Handing and Safety: 

>Antioxidant 618 /619 is Approved by the FDA for food contact applications under 21CFRl78.2010 covering antioxidants and/or stabilizers for poly­mers.

>For additional handing and toxicological information, please consult us for Maternal Safety Date Sheet.


Packed with plastic bag in composite plastic woven sack, Net 25kg/bag,1000kg/pallet, 10pallet/20’FCL,or according to customers’ requirements.