N-Ethyl-N-isopropylaminoethane-2-thiol from China
Mixed dialkyl substituted aminoethane-2-thiol with ethyl and isopropyl groups on nitrogen. Qualifies for HTS 2930.90.92.22 as it uses permitted alkyl groups (ethyl, isopropyl) in the N,N-dialkyl aminoethane-2-thiol definition, excluding only specific dimethyl/diethyl. Applied in metal chelation chemistry and drug development.
Duty Rate — China → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Label with exact alkyl composition; mixed substituents common pitfall for wrong subheading
• Include proton NMR data in entry docs to confirm structure matches heading description
• Check for protonated salt form; declare as such since salts included in this HTS provision