2,5-Diphenyloxazole NMR Standard
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If packaged as multi-component NMR test mixture
Laboratory diagnostic mixtures containing multiple references classified as composite reagents.
If classified as other heterocyclic compound without specific oxazole provision
General heterocyclic basket provision if specific 2934.99.08.00 not explicitly applicable.
If when certified for biological assay standards
Immunological product standards containing organic references fall under Chapter 30.
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Import Tips & Compliance
• 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
Related Products under HTS 2934.99.08.00
2,5-Diphenyloxazole (PPO)
2,5-Diphenyloxazole is a fluorescent organic compound classified under HTS 2934.99.08.00 as an aromatic heterocyclic compound containing an oxazole ring with phenyl substituents. It is primarily used as a primary scintillator in liquid scintillation cocktails for detecting beta radiation in radiochemical analysis.
2,5-Diphenyloxazole Scintillation Grade
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.
PPO (2,5-Diphenyloxazole) Research Chemical
Laboratory-grade 2,5-Diphenyloxazole imported for organic synthesis and fluorescence studies under HTS 2934.99.08.00. This compound serves as wavelength shifter in multi-component scintillator systems and precursor for custom fluorophores. Packaged in amber glass for light-sensitive applications.
High-Purity PPO for Plastic Scintillators
Ultra-pure 2,5-Diphenyloxazole (PPO) dissolved at 2% in polystyrene for extruded plastic scintillator sheets, under HTS 2934.99.08.00 when imported as pure active ingredient. Essential for high-energy physics detectors and security screening systems. Provides 360nm emission peak matching PMT sensitivity.