N-Nitrosodiphenylamine Analytical Standard from Canada
High-purity N-Nitrosodiphenylamine (99.5%+) certified reference material for EPA Method 8270 laboratory analysis. Classified under HTS 2921.44.0500 as the pure named chemical meeting Chapter 29 purity requirements. Used for calibration of GC-MS instruments detecting nitrosamines in environmental samples.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide NIST traceability certificate; labs require documented chain of custody
• Declare as 'analytical reference standard' to avoid 3822 reclassification