Chloromethylphosphonic dichloride from Mexico
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 — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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