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EC number: 211-989-5
CAS number: 732-26-3
The EC50 was determined to be >1000 mg/L.
A single data source was available to address this endpoint. The study
was assigned a reliability score of 2 according to the criteria of
Klimisch et al. (1997) and has therefore been used as the key value for
The potential of the test material to inhibit activated sludge was
investigated in a study which was conducted in broadly in accordance
with the standardised guideline OECD 209.
A mixed population of activated sewage sludge microorganisms from a
predominantly domestic sewage source was exposed to the test material
for a contact time of 3 hours. Following a preliminary toxicity test,
the concentration tested was limit value of 1000 mg/L.
The sample was maintained at 21°C with continuous aeration and used on
the day of collection. The pH was buffered to pH 7.3 with sodium
hydroxide solution and the suspended solids level equal to 3.7 g/L prior
The percentage inhibition of growth caused by the test material was
assessed by measuring the O₂ consumption rates. The
test material caused 9 % inhibition of growth.
Under the conditions of this study the EC50 was determined to be >1000
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