Isopropyl Methylphosphonothioic Acid from Canada
An acid-form organo-phosphorus thioate used in specialized pesticide intermediates. Features phosphorus bonded to isopropyl group with thioic sulfur, fitting HTS 2930.90.43.20 criteria for no other carbons. Qualifies as separate chemically defined compound under chapter notes.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Document pH stability and acid content to prevent misclassification as inorganic salts
• Hazardous material declarations required for thioic acids; use UN-approved packaging
• Avoid bulk packaging without anti-dusting agents if needed for safety per chapter note (g)