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pe·rox·y·a·ce·tyl ni·trate(pĕ'rok-sē-ă-sē'til nī'trāt),
The major pollutant responsible for eye and nose irritation in smog.
Farlex Partner Medical Dictionary © Farlex 2012
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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.