Anthanthrene is a polycyclic aromatic hydrocarbon. According to the International Agency for Research on Cancer, as of 2006 there was 'limited evidence in experimental animals' that it is a carcinogen. Anthanthrene is a polycyclic aromatic hydrocarbon. According to the International Agency for Research on Cancer, as of 2006 there was 'limited evidence in experimental animals' that it is a carcinogen.