1,1-Diphenyl-2-picrylhydrazyl from Germany
1,1-Diphenyl-2-picrylhydrazyl (DPPH) is a stable free radical used as an antioxidant assay standard in research. Falls under HTS 2928.00.50.00 as 'other' hydrazine derivative, being a chemically defined organic compound with hydrazine core despite extensive substitution. Its purple crystalline form is characteristic for spectroscopic applications.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Light-sensitive; use amber packaging for shipments; provide radical assay certificate (98%+ purity); DEA-exempt for research quantities