Registration Dossier
Registration Dossier
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EC number: 700-661-1 | CAS number: -
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
The acute toxicity to fish was tested in rainbow trout (Oncorhynchus mykiss) over a 96 h period in accordance to OECD (1992) Guideline 203 and EC (1992) Guideline C1. The study was conducted under continuous flow conditions and revealed a 96 h LC50 of 0.75 mg/L and a 96 h NOEC for mortality of 0.5 mg/L. The results are based on nominal concentrations.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 0.75 mg/L
Additional information
The acute toxicity of PSOA (Peroxy Sulfonated Oleic Acids) to rainbow trout (Oncorhynchus mykiss) was assessed by estimating the mean lethal concentration (LC50) over a 96 h period. Based on the results of a range finding test, the definitive test was conducted at nominal PSOA concentrations of 0.0625, 0.125, 0.25, 0.5 and 1 mg/L, plus solvent and non-solvent controls. The definitive test was conducted under continuous flow conditions at a nominal flow rate of 35 mL/minute. The cumulative mortality recorded at 96 hours was seven fish (100%) at 1 mg/L. No mortality was recorded at any other test concentration.
Due to the lack of fractional mortality data, LC50 values were estimated by taking the mean of the 0% and 100% mortality concentrations. The no observed effect concentration (NOEC) is reported for mortality and observed effects.The 96 h LC50 of PSOA to rainbow trout (Oncorhynchus mykiss) was determined to be 0.75 mg/L, based on nominal concentrations. The 96 h NOEC for mortality was 0.5 mg/L, and for observed effects 0.25 mg/L, based on nominal concentrations of PSOA.
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