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%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
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