1,1-Diphenyl-2-picrylhydrazyl from Mexico
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 — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, 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