CAS Number: 50-32-8. A polycyclic aromatic hydrocarbon (PAH)
that is a by-product of combustion. The combustion sources
are numerous, including natural sources such as wildfires,
industrial processes, transportation, energy production and
use, food preparation, smoking tobacco, and disposal activities
such a as open trash burning. Chemical formula = C20H12.
Molecular weight = 252.32 g/mol.
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