1-Azacycloheptane (Hexamethyleneimine) from China
1-Azacycloheptane, the systematic name for hexamethyleneimine, is a saturated seven-membered ring with one nitrogen atom. It qualifies for HTS 2933.99.89.00 as a heterocyclic compound with nitrogen hetero-atoms only, explicitly listed in this subheading. Commonly used in coordination chemistry and as a ligand precursor.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.60100%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
• Label as 'Corrosive, flammable liquid UN 2735'; ensure secondary containment for spill prevention during ocean freight
• Provide NMR spectrum verification; customs may challenge classification if documentation lacks structural confirmation
• Avoid retail packaging over 1L to prevent shift to consumer chemical headings; bulk industrial packaging maintains Chapter 29 status