Registration Dossier
Registration Dossier
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EC number: 203-117-7 | CAS number: 103-49-1
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The following values were determined: ErC50 = 18.8 mg/L, ErC10 = 3.2 mg/L, NOEC [r] = 0.1 mg/L and LOEC [r] = 0.32 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 18.8 mg/L
- EC10 or NOEC for freshwater algae:
- 0.1 mg/L
Additional information
The cell densities were measured at 24 hour intervals. Inhibition of the algal population was measured as reduction in growth rate (index r), relative to control cultures grown under identical conditions. Growth rates were also used to calculate a No Observed Effect Concentration and a Lowest Observed Effect Concentration according to Welch-t test for Inhomogeneous Variances with Bonferroni-Holm Adjustment.
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