n-Propylphosphonic Acid Formulation from Canada
Formulation primarily of n-propylphosphonic acid for use in corrosion inhibitors and scale control in oilfield chemicals. Classified in HTS 3824.99.93.61 due to the defining phosphorus-n-propyl bond with no additional carbons. This prep is optimized for industrial fluid applications.
Duty Rate — Canada → United States
15%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Certify compliance with Clean Water Act if for oilfield use; include end-use statements
• Test for heavy metals as impurities, as exceeding limits triggers waste classification
• Use ISPP codes precisely to avoid bundling with general phosphonates