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Term of the week:

Heavy Petroleum Distillate (HPD) (C9 - C23)

A general class of combustible liquids which includes #2 fuel oil (home heating oil) and diesel fuel. Most HPDs considered as ignitable liquids would have flash points between 100-200 degrees F. The chromatographic profile of a HPD consists of a series of normal alkanes between C9 and C23; the most abundant n-alkane above C12; and at least five consecutive n-alkane peaks must be present between C14 and C20. Branched alkanes and the compounds pristane and phytane are present between the normal alkanes.

For more information on this term, see the interFIRE VR Resource File article: “The Pocket Guide to Accelerant Evidence Collection”

 
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