Isopropyl Methylphosphonic Acid from Canada
Isopropyl methylphosphonic acid features phosphorus bonded to one methyl and one isopropyl group, precisely matching HTS 2930.90.9225's structural requirement. Used as a metabolite marker in pesticide and chemical weapons monitoring. The limited carbon attachment ensures chapter 29 classification.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6096.3%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Provide GC-MS data verifying isopropyl P-C bond; essential for distinguishing from general phosphonates
• Include origin certificates; synthesis route affects dual-use controls under export regulations
• Avoid bulk packaging over 25kg; triggers hazardous material surcharges and additional inspections