PCB 77

formula: C12H6Cl4 ; CAS Registry Number: 32598-13-3

PCB 77 belongs to the toxicologically relevant group of dioxin-like PCBs (DL-PCBs, also known as WHO-PCBs) that have molecular-biological properties resembling those of dioxins and furans.Toxic equivalency factor according to WHO(2005) (WHO-TEF(2005)): 0.0001


  • Bioindicator in rivers and lakes
  • As the only viviparous fish in German nearshore waters, it is a bioindicator in nearshore coastal marine ecosystems.
  • Inshore, the herring gull mainly feeds from the sea: upon fish, mussels, and crabs.

Sampling area

Sampling period

2008 - 2023