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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

Isopropyl Methylphosphonic Acid from Canada — Import Duty Rate | HTS 2930.90.92.25