ChemicalBook > CAS DataBase List > 2,5-Diphenyloxazole

2,5-Diphenyloxazole

Product Name
2,5-Diphenyloxazole
CAS No.
92-71-7
Chemical Name
2,5-Diphenyloxazole
Synonyms
PPO;DPO;Polyphenylene ether;DPO PPO;Tritosol;usafek-6775;USAF ek-6775;2,5-DiphenyL;Diphenyloxazole;dpo(scintillator)
CBNumber
CB3693821
Molecular Formula
C15H11NO
Formula Weight
221.25
MOL File
92-71-7.mol
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2,5-Diphenyloxazole Property

Melting point:
72-74 °C(lit.)
Boiling point:
360 °C(lit.)
Density 
1.06
vapor pressure 
0.002Pa at 25℃
refractive index 
1.6231 (estimate)
Flash point:
360°C
storage temp. 
Sealed in dry,Room Temperature
solubility 
very faint turbidity in Methanol
pka
0.39±0.10(Predicted)
form 
Liquid
color 
White
Water Solubility 
NEGLEGIBLE
λmax
303 nm
BRN 
157021
Stability:
Stable. Incompatible with strong oxidizing agents.
LogP
4.1 at 30℃ and pH5.6
CAS DataBase Reference
92-71-7(CAS DataBase Reference)
NIST Chemistry Reference
Oxazole, 2,5-diphenyl-(92-71-7)
EPA Substance Registry System
Oxazole, 2,5-diphenyl- (92-71-7)
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Safety

Hazard Codes 
Xi,Xn
Risk Statements 
36/37/38-36-22
Safety Statements 
24/25-25-24-36/37-26
WGK Germany 
3
RTECS 
RP6825000
TSCA 
Yes
HS Code 
29349990
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H319Causes serious eye irritation

H413May cause long lasting harmful effects to aquatic life

Precautionary statements

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
GF97809700
Product name
Polyphenyleneoxide
Purity
(PPO ), (ppo (modified), ppe (modified)), rod, diam. 100?mm, L 50?mm, pale gray
Packaging
1EA
Price
$464
Updated
2025/07/31
Sigma-Aldrich
Product number
GF97809700
Product name
Polyphenyleneoxide
Purity
(PPO ), (ppo (modified), ppe (modified)), rod, diam. 100?mm, L 50?mm, pale gray
Packaging
5EA
Price
$1880
Updated
2025/07/31
Sigma-Aldrich
Product number
GF93476683
Product name
Polyphenyleneoxide
Purity
(modified), 30% glass fiber reinforced
Packaging
1 ea
Price
$212
Updated
2025/07/31
Sigma-Aldrich
Product number
GF93476683
Product name
Polyphenyleneoxide
Purity
(modified), 30% glass fiber reinforced
Packaging
5 ea
Price
$860
Updated
2025/07/31
Sigma-Aldrich
Product number
GF93476683
Product name
Polyphenyleneoxide
Purity
(modified), 30% glass fiber reinforced
Packaging
10 ea
Price
$1570
Updated
2025/07/31
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2,5-Diphenyloxazole Chemical Properties,Usage,Production

Chemical Properties

light beige solid

Uses

PPO can be used as a dopant that improves the photo-electric feedback of plastic scintillators which are used as radiation detectors for nuclear materials. It can be coated on peptide substrates to facilitate radioactive labelling which can enable determination of substrate specificity of lysine methyltransferase enzymes. It may also be used in the fabrication of organic luminescent materials which can be used in light emitting diodes (LEDs).

Synthesis Reference(s)

Journal of the American Chemical Society, 88, p. 1844, 1966 DOI: 10.1021/ja00960a066
The Journal of Organic Chemistry, 36, p. 1937, 1971 DOI: 10.1021/jo00813a021

General Description

2,5-Diphenyloxazole (PPO) is an oxazole that can be used as a scintillator and a laser dye. It has fluorescence at a wavelength of 375 nm. It can be used as a wavelength shifter in liquid samples due to their high quantum yield and large strokes shift.

Hazard

May cause irritation

Synthesis

The synthesis of 2,5-Diphenyloxazole is as follows:
In a 5000L enamel reactor with mechanical stirring and a thermometer, add benzoylaminoacetic acid (179 kg, 1 km) and thionyl chloride (238 kg, 2 km), react at 50°C, and monitor the sample until the compound is fully reacted. Unreacted thionyl chloride is distilled off to obtain benzoylaminoacetyl chloride. Cool down to 50°C, add benzene (780 kg, 10 kmol) to the reactor andAluminum trichloride (267 kg, 2 kmol), heated to reflux for 3 hours.The obtained N-benzoyl-ω-aminoacetophenone reaction solution was cooled to 30°C, 50 wt% sulfuric acid (392 kg, 2 kmol) was added, and the temperature was slowly raised to 100°C, and the reaction was completed at this temperature. Excess benzene was distilled off, the reaction solution was cooled to 30°C, water (1568 kg) was added dropwise to the reactor, and a white solid was precipitated, filtered, and rectified to obtain 2,5-diphenyloxazole of about 202 kg. The yield was 91.4%, the content was 99.3% (HPLC).

Purification Methods

Distil it in steam and crystallise it from ligroin. [Beilstein 27 III/IV 1437.]

2,5-Diphenyloxazole Preparation Products And Raw materials

Raw materials

Acetophenone

Preparation Products

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View Lastest Price from 2,5-Diphenyloxazole manufacturers

Hebei Zhuanglai Chemical Trading Co.,Ltd
Product
2,5-Diphenyloxazole 92-71-7
Price
US $45.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
5000kg/week
Release date
2024-05-31
Hebei Chuanghai Biotechnology Co,.LTD
Product
2,5-Diphenyloxazole 92-71-7
Price
US $5.00-2.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
10000kg
Release date
2024-08-19
Career Henan Chemical Co
Product
2,5-Diphenyloxazole 92-71-7
Price
US $8.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
10MT
Release date
2018-12-17

92-71-7, 2,5-DiphenyloxazoleRelated Search:

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