Hexamethylenediamine from Mexico
Hexamethylenediamine, an acyclic diamine used primarily in nylon-6,6 production, is classified under HTS 2921.29.00.55 as an other acyclic polyamine. It meets Chapter 29 requirements for chemically defined organic compounds.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.6093.5%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
• Submit Letter of Intent to Manufacture (LOI) under TSCA for polymer production use
• Confirm >99% purity via analytical certificate to maintain Chapter 29 classification
• Avoid bulk packaging that could trigger 'prepared for retail sale' reclassification