Registration Dossier
Registration Dossier
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EC number: 298-265-2 | CAS number: 93783-70-1
Toxicity to aquatic plants other than algae
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
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