2,5-Diphenyloxazole NMR Standard from China
Certified reference material of 2,5-Diphenyloxazole at 98% purity with NIST-traceable NMR spectrum, classified HTS 2934.99.08.00. Used for calibrating 1H and 13C NMR spectrometers in pharmaceutical QC labs. Provides characteristic aromatic proton signals at 7.9-8.1 ppm.
Duty Rate — China → United States
112.5%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include NIST traceability certificate and assigned NMR chemical shift values on Certificate of Analysis
• Declare as 'Instrument Calibration Standard' to qualify for potential research import exemptions
• Verify DEA List I chemical exemption status (not controlled) for institutional import clearance