Phenanthroline from Canada
1,10-Phenanthroline is a tridentate heterocyclic ligand forming colored complexes with metal ions, used in analytical chemistry. Falls under HTS 2934.99.90.01 as other heterocyclic nitrogen compounds.
Duty Rate — Canada → United States
6.5%
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
• Specify chelation capacity in technical data sheet for lab reagent verification
• Use child-resistant packaging if >1% concentration per CPSC rules
• Test for heavy metal impurities which affect complex formation purity