Songnox 168 Phosphite Stabilizer for Polymers from China
Songnox 168 is a secondary phosphite antioxidant that synergizes with primary antioxidants to decompose peroxides in polypropylene during extrusion. It qualifies for HTS 3812.39.9000 as a compound stabilizer for plastics. Used in food packaging films and automotive parts.
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
• Include FDA compliance letters if destined for food-contact plastics
• Test for phosphite content to distinguish from general phosphate chemicals
• Package in UN-approved drums; declare as non-hazardous if stabilized