Peroxyacetyl nitrate

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Peroxyacetyl nitrate
Peroxyacetyl-nitrate-2D-skeletal.png
Peroxyacetyl-nitrate-3D-balls.png
Names
IUPAC name
nitroethaneperoxoate
Systematic IUPAC name
ethanoic nitric peroxyanhydride
Other names
PAN
peroxyacetyl nitrate
α-oxoethylperoxylnitrate
Identifiers
3D model (Jmol)
ChemSpider
ECHA InfoCard 100.017.187
EC Number 218-905-6
Properties
C2H3NO5
Molar mass 121.05 g mol−1
1.46 × 10 5 mg l−1 at 298 K
log P −0.19
Vapor pressure 29.2 mmHg at 298 K
0.000278 m3 atm mol−1 at 298 K
Atmospheric OH rate constant
10−13 cm3 molecule−1 s−1 at 298 K
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Peroxyacetyl nitrate is a peroxyacyl nitrate. It is a secondary pollutant present in photochemical smog. It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. It is a lachrymatory substance.

Peroxyacetyl nitrate, or PAN, is an oxidant that is more stable than ozone. Hence, it is more capable of long-range transport than ozone. It serves as a carrier for oxides of nitrogen (NOx) into rural regions and causes ozone formation in the global troposphere.

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