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
19%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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