Doverphos S-480 Phosphite for PVC Stabilization from Canada
Doverphos S-480 is distearyl pentaerythritol diphosphite providing hydrolysis resistance in rigid PVC pipe compounds. Classifies under HTS 3812.39.9000 as plastics compound stabilizer. Essential for long-term outdoor weatherability.
Duty Rate — Canada → United States
15%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Certify phosphorous acid content per ASTM test methods
• Include PVC formulator trial data supporting stabilizer function
• Hydrophobic packaging required for moisture-sensitive phosphites