2-(N,N-Diisopropylamino)ethanethiol from China
An organo-sulfur compound with isopropyl groups on the nitrogen atom, specifically 2-(N,N-diisopropylamino)ethanethiol. Classified under HTS 2930.90.92.22 due to its aminoethane-2-thiol structure with permitted isopropyl dialkyl substitution, excluded only dimethyl/diethyl forms. Commonly used in synthesis of thioether ligands and pharmaceutical precursors.
Duty Rate — China → 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
• Submit NMR or GC-MS spectra confirming isopropyl substitution to distinguish from excluded analogs
• Package with stabilizer if prone to oxidation; declare as UN2785 for hazardous thiol transport
• Verify not mixed with excluded isomers; pure compounds only qualify for this specific subheading