High Purity Methylphosphonic Acid for Synthesis from China
Ultra-high purity methylphosphonic acid (99.9%) for laboratory and pharmaceutical synthesis, classified under HTS 2931.44.00.00 as a separate chemically defined organo-inorganic compound. Essential precursor for advanced phosphonate drugs and ligands.
Duty Rate — China → United States
16.2%
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
• Submit TSCA certification for new chemical import; segregate from amines to avoid reactions
• Common pitfall: incorrect purity declaration leading to Chapter 38 reclassification