Registration Dossier
Registration Dossier
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EC number: 906-256-8 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Measured data: EC50, 96hr: monoethylene glycol 6500-13000mg/l
TGK (~EC5), 8 day: diethylene glycol: 2700, triethylene glycol: >10000mg/l
QSAR values: 96hr EC50: 3500, 9400, 20500mg/l respectively
QSAR Chv values: 480, 1200, 2500mg/l respectively
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 6 500 mg/L
Additional information
Test data is available for all constituents of this substance. However, two of the studies used 8 day testing protocols that are now regarded as unreliable (growth in exponential state cannot be maintained over such a period.) QSAR data suggests that toxicity decreases with increasing molecular weight of the ethylene glycol series and therefore predicts that monoethylene glycol (MEG) will be the most toxic. The lowest end of the range of the 96hr EC50 values for MEG is therefore used as a conservative value for the EC50 of the substance. No reliable EC10 figure can be derived. There is no data on saltwater species.
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