Doverphos S-480 Phosphite for PVC Stabilization from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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