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Ecotoxicological information

Toxicity to microorganisms

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Reference
Endpoint:
toxicity to microorganisms
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Justification for type of information:
Data is from secondary literature
Qualifier:
according to
Guideline:
ISO 8192 (Water quality - Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation)
Principles of method if other than guideline:
Toxicity of test chemical were checked by observing effect of test chemical on the oxygen consumption of activated sludge.
GLP compliance:
no
Analytical monitoring:
no
Vehicle:
no
Test organisms (species):
activated sludge
Test type:
not specified
Water media type:
not specified
Total exposure duration:
3 h
Reference substance (positive control):
not specified
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
362 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
other: inhibition of oxygen consumption
Remarks on result:
other: Other details not known
Validity criteria fulfilled:
no
Conclusions:
The effective concentration (EC50) value of test chemical on microorganism (activated sludge) in a 3 hr study was determine to be 362 mg/L.
Executive summary:

Toxicity of test chemical were checked by observing effect of test chemical on the oxygen consumption of activated sludge. Test conducted for 3 hrs. The effective concentration (EC50) value of test chemical on microorganism (activated sludge) in a 3 hr study was determine to be 362 mg/L.

Description of key information

Toxicity of test chemical were checked by observing effect of test chemical on the oxygen consumption of activated sludge. Test conducted for 3 hrs. The effective concentration (EC50) value of test chemical on microorganism (activated sludge) in a 3 hr study was determine to be 362 mg/L.

Key value for chemical safety assessment

EC50 for microorganisms:
362 mg/L

Additional information

Toxicity of test chemical were checked by observing effect of test chemical on the oxygen consumption of activated sludge. Test conducted for 3 hrs. The effective concentration (EC50) value of test chemical on microorganism (activated sludge) in a 3 hr study was determine to be 362 mg/L.