Methyl [O-2-(Dipropylamino)ethyl] Methylphosphonite Ester from Japan
This O-alkyl ester of a dipropylaminoethyl hydrogen methylphosphonite falls squarely under HTS 2931.49.00.08 due to its defined dialkylamino and C≤10 alkyl structure. Primarily utilized in ligand synthesis for transition metal catalysts.
Duty Rate — Japan → United States
15%
Rate breakdown
9903.04.6211.3%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% 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
• Label containers with UN number for phosphorous esters; mislabeling leads to customs holds
• Provide structural formula verification via NMR/GC-MS data to confirm classification over broader 2931.49.00
• Avoid retail packaging as this triggers exclusion under Chapter notes for consumer preparations