High-Purity 4,4'-Biphenol Flakes from China
High-purity 4,4'-Biphenol in flake form (>99.5% purity) is a key polyphenol for advanced polymer production, specifically named in HTS 2907.29.15.00. It serves as a monomer in polycarbonate resins and flame retardants. Meets Chapter 29 requirements for separate chemically defined organic compounds without disqualifying impurities.
Duty Rate — China → United States
37.5%
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 HPLC purity certificate showing >99% to affirm chemical definition; Use UN-approved packaging for phenolic compounds to meet transport safety notes (e); Watch for anti-dumping duties on phenol derivatives from certain origins