Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

A short-term daphnia study and algal inhibition study are available for nonanal. A short-term fish toxicity study is not available. However, a valid study exists for the analogue substance decanal. The read-across is considered suitable and is justified based on the structural and "mechanistic action" similarities between the target substance (nonanal) and source substance (decanal) and their similar physico-chemical properties. The observed L(E)C50 values from the short-term aquatic toxicity data are 1.45 mg/L (96-hour for freshwater fish), 1.54mg/L (for freshwater invertebrate) and 4.5mg/L (72-hour growth rate EC50 for freshwater algae).

The algal inhibition test is also considered a chronic test. The observed NOEC was 0.759mg/L. Long-term toxicity testing is not available for freshwater fish or invertebrates. In accordance with Annex IX of Regulation (EC) No 1907/2006, long-term toxicity testing is not considered to be necessary as the Chemical Safety Assessment (CSA) demonstrates safe use of nonanal.

The toxicity to STP microorganisms has been assessed using the activated sludge respiration test. The observed 3-hour EC50 is ~ 70 mg/l.