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179485

4-Oxo-TEMPO

Synonym(s):

4-Oxo-2,2,6,6-tetramethyl-1-piperidinyloxy, free radical

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About This Item

Empirical Formula (Hill Notation):
C9H16NO2
CAS Number:
2896-70-0
Molecular Weight:
170.23
NACRES:
NA.22
PubChem Substance ID:
24850816
UNSPSC Code:
12352000
EC Number:
220-778-7
MDL number:
MFCD00006187
Form:
solid
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form

solid

Quality Segment

100

functional group

ketone

storage temp.

2-8°C

SMILES string

CC1(C)CC(=O)CC(C)(C)N1[O]

InChI

1S/C9H16NO2/c1-8(2)5-7(11)6-9(3,4)10(8)12/h5-6H2,1-4H3

InChI key

WSGDRFHJFJRSFY-UHFFFAOYSA-N

General description

4-Oxo-TEMPO is formed by the reaction of 2,2,6,6-tetramethyl-4-piperidone (4-oxo-TMP) and 1O2. It is a stable paramagnetic product formed during the irradiation of TiO2 in aqueous suspensions.

Application

4-Oxo-TEMPO was employed as nitroxide standard to investigate the generation of singlet oxygen by photoexcited TiO2 in ethanol by ESR spectroscopy. It may be employed as free radical polarizing agent in dynamic nuclear polarization (DNP) studies.
Free-radical nitroxide spin probe typically used for:
  • Redox sources for anodes in lithium secondary batteries
  • Free-radical biological studies
  • Radical spin-trapping
  • Electron paramagnetic resonance studies
  • Polymer chemisty and synthesis applications

pictograms

Environment
GHS09

signalword

Warning

hcodes

H400

pcodes

P273

Hazard Classifications

Aquatic Acute 1

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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