Doverphos S-480 Phosphite for PVC Stabilization from China
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 — China → United States
42.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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