peroxyacetyl nitrate

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per·ox·y·a·cet·yl nitrate

Abbr. PAN A toxic organic compound, C2H3NO5, formed photochemically in smog, causing eye irritation and damage to vegetation. Due to the stability of this compound, it may be transported in air over long distances before breaking down into smaller reactive compounds.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Cheema said that Ozone and peroxyacetyl nitrate (PAN) get produced during the mixing of pollution/smog and fog, and this reaction was harmful to vegetables, fruits, plants and crops depending on concentration and duration of exposure.
They found that 4 hours of exposure to a mixture composed largely of primary pollutants (nitric oxide, nitrogen dioxide, and 55 hydrocarbons) at environmentally relevant concentrations changed the expression of 19 genes, compared with 709 altered genes following similar exposure to a mixture of primary and secondary pollutants (including ozone, formaldehyde, and peroxyacetyl nitrate).
Further analysis suggested that formaldehyde and peroxyacetyl nitrate (PAN) contribute to this gas-phase mutagenic activity.