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Merck
CN

D4630

2,5-Diphenyloxazole

suitable for liquid scintillation spectrometry

Synonym(s):

DPO, PPO

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About This Item

Empirical Formula (Hill Notation):
C15H11NO
CAS Number:
92-71-7
Molecular Weight:
221.25
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
24893888
EC Number:
202-181-3
Beilstein/REAXYS Number:
157021
MDL number:
MFCD00005306
Form:
powder

Key Documents

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Product Name

2,5-Diphenyloxazole, suitable for liquid scintillation spectrometry

InChI key

CNRNYORZJGVOSY-UHFFFAOYSA-N

InChI

1S/C15H11NO/c1-3-7-12(8-4-1)14-11-16-15(17-14)13-9-5-2-6-10-13/h1-11H

SMILES string

c1ccc(cc1)-c2cnc(o2)-c3ccccc3

form

powder

bp

360 °C (lit.)

mp

72-74 °C (lit.)

suitability

suitable for liquid scintillation spectrometry

Quality Level

200

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Application

2,5-Diphenyloxazole (PPO) can be used in:
  • fluorography techniques for the detection of tritium, tritiated glycopeptides, and 35S labeled proteins.
  • liquid scintillation cocktails as primary and secondary fluors.

General description

2,5-Diphenyloxazole (also known as PPO or p-phenylphenoxazole) is a fluorescent organic compound. It can be also used as an organic scintillator due to its high photoluminescence quantum yield and intriguing luminescent properties. It is widely used as a fluorescent probe or dye in analytical chemistry and biochemistry.

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

386.6 - 393.8 °F - closed cup

flash_point_c

197 - 201 °C - closed cup

ppe

Eyeshields, Gloves, type N95 (US)

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Certificates of Analysis (COA)

Lot/Batch Number
SLCR1805
0000439940
0000439940
SLCR6354
SLCR0384

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Study of new luminophores for use in modern scintillation cocktails
Janda J, et al.
Journal of Luminescence, 201, 390-396 (2018)
Two-component molecular materials of 2, 5-diphenyloxazole exhibiting tunable ultraviolet/blue polarized emission, pump-enhanced luminescence, and mechanochromic response
Yan, et al.
Advanced Functional Materials , 24, 587-594 (2014)
Wavelength dependant quenching of 2, 5-diphenyloxazole fluorescence by nucleotides
KrishnaMurthy NV, et al.
Journal of Fluorescence, 18, 29-34 (2008)
F M Williams et al.
British journal of clinical pharmacology, 22(3), 263-268 (1986-09-01)
As a substrate for human liver microsomes, ethoxyresorufin appears to be metabolised by a group of cytochrome P450 isoenzymes which are inducible by cigarette smoking. Kinetic studies in microsomes from four human livers indicate that only one enzyme component is
J T Ahokas et al.
Pharmacology & toxicology, 61(3), 184-190 (1987-09-01)
The oxidative metabolism of 2,5-diphenyloxazole (PPO) is associated with 3-methylcholanthrene inducible cytochrome P-450. The major metabolite formed has m/z of 237, corresponding to hydroxylated PPO. All the possible hydroxylated metabolites of PPO were synthesized and characterized, enabling the assignment of
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