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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

The 3-h EC50 value is >100 mg/L in activated sludge from a municipal sewage treatment plant.

Key value for chemical safety assessment

EC50 for microorganisms:
100 mg/L

Additional information

The effect of EEA-NH4 on microorganisms was determined in a GLP-compliant study according to OECD guideline 209 (NOTOX, 2008).

In this limit test, microorganisms in activated sludge from a municipal sewage treatment plant receiving predominantly domestic sewage were exposed for 3 hours to 100 mg/L EEA-NH4 (in duplicate). The test solution was continuously aerated and stirried.

No significant inhibition (1%) of the respiration rate of the sludge was recorded at 100 mg/L EEA-NH4. Therefore, the EC50 of EEA-NH4 was determined at >100 mg/L (based on nominal concentrations).