Peroxyacetyl nitrate
Chemical compound / From Wikipedia, the free encyclopedia
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Peroxyacetyl nitrate is a peroxyacyl nitrate. It is a secondary pollutant present in photochemical smog.[1] It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas.[2] It is a lachrymatory substance, meaning that it irritates the lungs and eyes.[3]
Quick Facts Names, Identifiers ...
Names | |
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Preferred IUPAC name
Acetic nitric peroxyanhydride | |
Other names
PAN peroxyacetyl nitrate α-oxoethylperoxylnitrate | |
Identifiers | |
3D model (JSmol) |
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Abbreviations | PAN |
ChemSpider |
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ECHA InfoCard | 100.017.187 |
EC Number |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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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 |
Henry's law constant (kH) |
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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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.[1]