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Polymer Additives
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Technical Datasheet | Supplied by SI Group
WESTON® 398 is trisnonylphenyl phosphite. Acts as an antioxidant. Has low color and low nonylphenol content. Improves the color and processing stability during recovery, drying, compounding, processing and end use. Synergism is realized when this product is combined with other stabilizers such as hindered phenols. May be added alone or in combination with the monomers and/or in antioxidant emulsions during recovery and/or during compounding. Used for the end use of a variety of polymers such as HDPE, LLDPE, SBR, ABS, PVC and others.
Product Type
Antioxidants > Phosphites
Chemical Composition
Trisnonylphenyl Phosphite
CAS Number
SpecialChem additionnal informations based on CAS Number : 26523-78-4

Hansen Solubility Parameters

[16.4, 0.3, 1.2]
[δD - Dispersion force interactions, δP - Polar force interactions, δH - Hydrogen bond force interactions]

Please note, these HSP values are estimations. It is based upon the “like seeks like” principle. It splits an ingredients interactions into three parameters; δD (Dispersion force interactions), δP (Polar forces interactions) and δH (Hydrogen bond force interactions). Hansen Solubility Parameters can help you find a wide range of products that are predicted to be compatible with WESTON® 398. A practical determination of these HSP values would provide higher certainty. Learn More.

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