Registration Dossier

Ecotoxicological information

Toxicity to aquatic plants other than algae

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

After a 7 -day exposure under static conditions, effect levels as measured concentrations are:

- frond number: ErC50 = 3.52 (1.87 – 5.56) mg/l; EyC50 = 0.169 (0.0956 - 0.370) mg/l

- dry weight: ErC50 = 9.01 (7.68 – 10.7) mg/, EyC50 = 0.838 (0.494 – 1.50) mg/l.

Key value for chemical safety assessment

EC50 for freshwater plants:
3.52 mg/L
EC10 or NOEC for freshwater plants:
0.028 mg/L

Additional information

The study was conducted according to OECD guideline 221 under static conditions. Concentrations were analytically monitored; at day 0, measured concentrations were between 92 to 99 % of nominal values; at day 7, measured concentrations were between 90 % and < LOQ of nominal concentrations. Therefore, effects levels were reported as measured concentrations.

At 7 day of exposure, effect levels as inhibition on growth rate and yield were:

ErC10 = 0.0283 mg/l, ErC50 = 3.52 mg/l, EyC10 = 0.0256 mg/l, EyC50 = 0.169 mg/l for frond number

ErC10 = 0.0852 mg/l, EcrC50 = 9.01 mg/l, EyC10 = 0.0342 mg/l, EyC50 = 0.838 mg/l for dry weight