N-Aminoethylpiperazine (Purified Trace) from Japan
High-purity N-aminoethylpiperazine with <0.1% cyclic impurities qualifies as acyclic diamine derivative under HTS 2921.19.61.95 per chemical definition precedence.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit HPLC chromatogram showing cyclic piperazine <0.5% area to prove acyclic dominance
• Classify as UN 2815 toxic liquid with inhalation hazard for quantities >5L
• Validate batch molecular weight against theoretical 129.21 g/mol