It belongs to the class of polycyclic aromatic hydrocarbons (PAHs) and is formed whenever there is incomplete combustion of organic matter.

[2] Dibenz(a,j)anthracene is generated whenever organic matter or fuel is incompletely burnt or combusted.

[2] In February 2014, NASA announced a database for tracking polycyclic aromatic hydrocarbons (PAHs), including dibenz[a,j]anthracene, in the universe.

[4] According to scientists, more than 20% of the carbon in the universe may be associated with PAHs, possible starting materials for the formation of life.

PAHs seem to have been formed shortly after the Big Bang, are widespread throughout the universe, and are associated with new stars and exoplanets.