Registration Dossier
Registration Dossier
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EC number: 203-765-0 | CAS number: 110-41-8
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
The test substance was assessed for toxicity to aquatic invertebrates according to OECD guideline 202. The 48 hr EC₅₀ was 0.21 mg/L and the NOEC was 0.053 mg/L.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 0.21 mg/L
Additional information
The test substance was assessed for toxicity to aquatic invertebrates according to OECD guideline 202. Microscopic observations performed on the immobilised daphnids showed no undissolved test substance adhered to the carapace. It was therefore considered that physical effects were not a factor. After 24 hours a 50% response on the mobility of the Daphnia magna was not reached therefore the 24-hour EC50 value could not be determined. After 48 hours, the concentration at which no significant (≤10%) dose related immobility occurred was 0.053 mg/L. The NOEC was considered to be 0.053 mg/L. After 48 hours 90% immobility was recorded at the highest treatment level tested of 0.48 mg/L. In terms of time-weighted mean measured concentrations the 48-hour EC50 value was determined to be 0.21 mg/L.
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