Description

2,5-Diphenyloxazole CAS NO 92-71-7 is a high-purity organic compound belonging to the oxazole class, widely recognized as a primary scintillator (PPO). Its core value proposition lies in its exceptional efficiency in converting ionizing radiation into detectable light pulses. This makes it an indispensable material for research and industrial applications requiring precise radiation detection and measurement. Key industries that rely on this product include nuclear research, medical diagnostics, and high-energy physics.

Application

• Primary Scintillator in Liquid Scintillation Counting (LSC): Used as the primary solute in organic scintillation cocktails for detecting low-energy beta emitters like tritium (³H) and carbon-14 (¹⁴C) in life science and environmental research.
• Component in Plastic Scintillators: Incorporated into polymer matrices to create solid plastic scintillators for γ-ray and neutron detection in radiation monitoring and homeland security.
• Wavelength Shifter: Acts as a secondary emitter (wavelength shifter) in large-volume detectors, absorbing and re-emitting light at longer wavelengths to match the optimal sensitivity of photomultiplier tubes.
• Research & Chemical Synthesis: Serves as a key intermediate or model compound in organic synthesis for developing new fluorescent materials, pharmaceuticals, and agrochemicals.
• Calibration Standards: Utilized in the preparation of calibration standards for scintillation counters and other radiometric instrumentation to ensure measurement accuracy.

Basic Information

Product Name	2,5-Diphenyloxazole
CAS No.	92-71-7
Molecular Formula	C₁₅H₁₁NO
Molecular Weight	221.25 g/mol
Synonyms	PPO; 2,5-Diphenyl-1,3-oxazole; Scintillation Grade PPO; 2,5-Diphenyloxazole Scintillator; Diphenyloxazole; NSC 51109; BBOX; POPOP (Note: POPOP is a related but different compound, often searched alongside PPO)
EINECS	202-182-6

Quality Control

Our 2,5-Diphenyloxazole is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure it meets the high-purity standards required for sensitive scintillation applications. Key parameters such as purity, fluorescence efficiency, and absorbance are meticulously controlled. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 99.0%
Melting Point	70 - 72 °C
Loss on Drying	≤ 0.5%
Fluorescence Emission Max	~365 nm (in toluene)
UV Absorbance (Specified Solvent)	Meets scintillation grade criteria

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.