A Damaging Explosion of Peroxyacetyl Nitrate

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Abstract
A damaging explosion of the smog component peroxyacetyl nitrate (PAN) was traced to the presence of liquid PAN in a pressure gauge and pipe fitting attached to the metal container. Some of the PAN vapor had condensed while stored in a cold room at about 0°C over a weekend. Recommendations for avoiding a repetition of this accident are given.