The best known member of a class of photochemical oxidizing agents known as the peroxyacyl nitrates. The peroxyacyl nitrates are formed when ozone reacts with hydrocarbons such as those found in unburned petroleum. They are commonly found in...

A photochemical oxidant responsible for much of the plant damage associated with photochemical oxidants. It is an eye irritant. PAN is relatively stable in the upper troposphere and acts a reservoir for nitrogen...

see Peroxyacetyl...

Peroxyacyl nitrates, or PANs, are powerful respiratory and eye irritants present in photochemical smog. They are formed from a peroxyacyl radical and nitrogen dioxide, for example peroxyacetyl nitrate, CH3COOONO2: Hydrocarbons + O2 + NO2 + light →...

Table 1 Domestic Output of Sodium Nitrate in Recent Years Year Output ('000 t) Growth over previous year (%) 1990 112.2 37.6 1991 126.9 13.1 1992 129.1 1.8 1993 123.9 -4.1 1994 127.9 3.3 1995 160.0 25.1 Table 2 Major Producers of Sodium Nitrate...

In the U.S. Geological Survey model of nitrate contamination in shallow ground water across the United States, increased likelihood or risk of nitrate contamination is associated with increases in nitrogen inputs (or "how much nitrogen is placed on the land surface") and aquifer...