Vanillin Impurity Standard Piperonal from Mexico
Certified reference piperonal at 0.1% concentration in acetonitrile for HPLC calibration in vanillin purity testing. Remains Chapter 29 under note 1(d)/(e) as diluted chemically defined compound for analytical use.
Duty Rate — Mexico → United States
14.8%
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
• Label as 'analytical standard only'; comply with DOT shipping for acetonitrile; provide chromatogram validation