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WESTON® 439 phosphite ester

Technical Datasheet | Supplied by SI Group
WESTON® 439 phosphite ester by SI Group is phosphite antioxidant used to improve the color and light stability & clarity of rigid PVC and rigid vinyl chloride copolymers. It is used for food packaging applications. It is used in conjunction with primary metal stabilizers and epoxy stabilizers, performance is improved. WESTON® 439 phosphite ester is FDA approved.
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Product Type
Antioxidants > Phosphites
Chemical Composition
Poly 4,4' isopropylidenediphenol C12-15 alcohol phosphite
CAS Number
96152-48-6
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Last edited September 22, 2023
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