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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The 30-min EC10 value for monoethanolamine in domestic activated sludge is >1000 mg/L, after correction for molecular weight an effect concentration of >5,624 mg/L for monoethanolamine oleate will be used in the assessment.

Key value for chemical safety assessment

EC10, LC10 or NOEC for microorganisms:
5 624 mg/L

Additional information

No respiration inhibition tests with activated sludge are available for monoethanolamine oleate. A non-GLP OECD guideline 209 study with domestic activated sludge is available for one of its starting materials, monoethanolamine (BASF, 1991). Monoethanolamine oleate is the salt of monoethanolamine and oleic acid. As oleic acid is exempted for registration according to Annex V of REACH Directive 2006/121/EC, the focus is only on the monoethanolammmonium cation of monoethanolamine oleate (for more details see reporting format for the analogue approach in Appendix A.2).

The 30-min EC10 value is >1,000 mg/L, a safety factor need not to be applied to this value. Instead, the effect concentration will be corrected for molecular weight. The effect concentrations of >5,624mg/L for monoethanolamine oleate will be used in the assessment.