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Toxicity to microorganisms

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Description of key information

Activated sludge respiration inhibition studies:

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
1 995 mg/L

Additional information

In a guideline activated sludge respiration inhibition test using 2-(2-(2-butoxyethoxy)ethoxy)ethanol, no effects were observed up to the maximum tested concentration of 1995mg/l. In a bacterial growth inhibition study using sewage micro-organisms, the IC50 was found to be greater than 5000mg/l. Neither study contains sufficient detail to be used soley as a key study and therefore a weight of evidence approach is used to fulfil the requirements for this end point. The key parameter is selected as the lowest of the two values available.