Registration Dossier
Registration Dossier
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EC number: 223-276-6 | CAS number: 3806-34-6
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
Key value determined in a GLP accredited laboratory test in accordance with OECD Guideline 203 and EU Method C.1.
The value is mg/L loading rate WAF.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 100 mg/L
Additional information
A study was performed to assess the acute toxicity of the test item to rainbow trout (Oncorhynchus mykiss).
Due to the low aqueous solubility and complex nature of the test item for the purposes of the test the test item was prepared as a Water Accommodated Fraction (WAF).
In accordance with the recommendations of REACH, this test was conducted according to the threshold approach recommended by ECHA. Using this approach the lowest EL50 value from either the Acute Toxicity to Daphnia Magna study or Algal Growth Inhibition Test is set as the threshold concentration and a “Limit test” is conducted at this threshold concentration. If no mortalities were observed then this indicated that fish are not the most sensitive species and that the LL50 is greater than the threshold concentration. Based on the results of an Algal Growth Inhibition test and the Acute Toxicity to Daphnia Magna study, fish were exposed, at a single concentration of 100 mg/L loading rate WAF for a period of 96 hours at a temperature of approximately 14 ºC under semi-static test conditions. The number of mortalities and any sub-lethal effects of exposure in each test and control vessel were determined 3 and 6 hours after the start of exposure and then daily throughout the test until termination after 96 hours.
Results
The 96-Hour LL50 based on nominal loading rates was greater than 100 mg/L loading rate WAF. The No Observed Effect Loading rate was 100 mg/L loading rate WAF.
It was considered unnecessary and unrealistic to test at loading rates in excess of 100 mg/L loading rate WAF.
Given that toxicity cannot be attributed to a single component or a mixture of components but to the test item as a whole, the results were based on nominal loading rates only.
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