Chloromethylphosphonic dichloride from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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