Registration Dossier

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Short-term toxicity studies for fish and aquatic invertebrates are available for decanal. Effects on algae and aquatic plants have not been determined for decanal since a valid study exists for the analogue substance nonanal. The read-across is justified based on the structural and "mechanistic action" similarities between the target substance (decanal) and source substance (nonanal) 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), 1.17 mg/L (for freshwater invertebrate) and 4.5 mg/L (72-hour growth rate EC50 for freshwater algae).

The algal inhibition test is also considered a chronic test. The observed NOEC based on growth rate 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 decanal.

The toxicity to STP microorganisms has been assessed using the activated sludge respiration test. The observed 3-hour EC50 is ~ 70 mg/l. The NOEC is 36.1mg/l.