Chloromethylphosphonic Acid from Canada
Chloromethylphosphonic acid is a halogenated phosphonic acid used in agrochemical synthesis and metal surface treatment. Classified in HTS 2931.59.00 for its chloromethyl group directly attached to phosphorus with carbon linkage.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Test for phosphonate vs phosphate structure for accurate classification
• Include pH adjustment procedures in SDS for safe handling
• Comply with pesticide precursor regulations if destined for agrochemical production