Ammonium undecafluorohexanoate

Endpoint summary

Additional information

Experimental studies investigating the short-term toxicity of ammonium undecafluorohexanoate (CAS 21615-47-4) to aquatic organisms are available. Moreover, chronic toxicity data are available for freshwater fish and algae. All studies were performed according to standard OECD guidelines. In the acute toxicity studies no effects up to 100 mg/L were observed for aquatic invertebrates and algae. Only in the acute fish study a LC50 (96 h) of 1850 mg/L was recorded which is far above the limit concentration of 100 mg/L relevant for regulatory purposes. The low toxicity of the substance to fish is further supported in two chronic toxicity studies with fish (OECD 229 and EPA OPPTS 850.1400). No effects on reproductive as well as endocrine parameters (larvae mortality, length, dry weight, number hatched, vitellogenin and fertility) were recorded. In addition no chronic effects on aquatic algae were recorded (EC10 (72 h) > 100 mg/L). Thus, it can be concluded that ammonium undecafluorohexanoate is of no hazard to aquatic organisms.
The effects of ammonium undecafluorohexanoate to activated sludge microorganisms were further investigated in a study according to OECD 209. No effects on the respiration rate was recorded resulting in a NOECD (3 h) ≥ 1000 mg/L. Thus, the degradation process in sewage treatment plants is not considered to be inhibited by the test item.