Chloromethylphosphonic dichloride from China
Chloromethylphosphonic dichloride (ClCH2P(O)Cl2) has phosphorus attached to one chloromethyl group meeting the HTS 2931.59.00.60 carbon limitation criterion despite halogen substitution. Used in flame retardant polymer additives production.
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
• Flame retardant precursors often trigger additional NFPA compliance documentation
• Verify 'no further carbon atoms' strictly; chloromethyl counts as single C per statistical definition
• Triple-check invoice descriptions; misclassification to Chapter 29 hydrocarbons common pitfall