2,5-Diphenyloxazole Scintillation Grade from China
High-purity 2,5-Diphenyloxazole (PPO) specifically refined for nuclear spectroscopy applications, classified under HTS 2934.99.08.00. This aromatic oxazole derivative exhibits optimal fluorescence quantum yield when dissolved in toluene or pseudocumene scintillators. Used in environmental monitoring and medical isotope research.
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
• Require lot-specific HPLC chromatograms showing <0.1% impurities for research-grade verification
• Declare exact CAS number (92-71-7) and molecular formula (C15H11NO) on commercial invoice
• Obtain EPA TSCA certification if destined for US research facilities handling radiochemicals