antioxidant-168- Ethaphos 368, Alkanox 240, songnox 1680,

Antioxidant 168, Irgafos 168, CAS 31570-04-4

Chemical Name:

Tris -(2,4-di -tert -butyl -phenyl )-phosphite

Formula C42H63O3P
Molecular Weight 647
CAS# 31570-04-4

Synonym name:

Ethaphos 368, Alkanox 240, songnox 1680


Appearance White powder
Content of 2,4-di-tert-butyl-phenyl Max.0.20%
Melting point 183.0-187.0℃
Volatilizing Max.0.30%
Solubility(20℃) Acetone 1
Chloroform 36
Cyclohexane 16
Ethanol 0.1
Ethyl acetate 4
n-Hexane 11
Methanol < 0.01
Dichloromethane 36
Toluene 30
Water < 0.01
Assay,effective components Min.98.0%


>Features: Low volatility; resistant to hydrolysis; protects polymers prone to oxidation during processing; prevents discoloration.

>Antioxidant 168 is a kind of phosphite ester antioxidant as processing stabilizer, used for polypropylene, polyethylene, and adhesives.

>The amount to be used may be 0.1%~1.0% depending on the substrate, processing conditions, and requirements of the end application.

>Blends with hindered phenols are particularly effective.In addition, they use combination with light stabilizers when need.

Handing and Safety:

>Antioxidant 168 is approved for indirect food contact applications.

>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.


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