Phosphonous Acid Bis(2,4-di-tert-butylphenyl) Ester Derivative from China
Technical-grade phosphonous acid derivative matching 4,4'-diphenylbisphosphonous acid di(2',2",4',4"-di-tert-butyl)phenyl ester specification, used in nylon and engineering plastics stabilization. HTS 2931.90.10.00 covers this exact aromatic organo-inorganic structure with direct P-C bonds.
Duty Rate — China → United States
19%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Label with GHS hazard pictograms and UN numbers for proper hazmat declaration
• Verify >99% assay via HPLC; lower purity risks 2931.90.90.00 or 3824 classification