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Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Endpoint:
toxicity to microorganisms
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: No statistical evaluation. The used test concentration was much above solubility limit of the substance.

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed
Year:
1993
Report Date:
1993

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: Respiration inhibition in activated sludge (OECD guidelines method no 209, Dir. 88/302/EEC Official Journal L133 vol 31.p.118.(30.05.88))
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent

Test organisms

Test organisms (species):
activated sludge, domestic

Study design

Test type:
other: aerobic
Water media type:
freshwater
Total exposure duration:
3 h
Remarks on exposure duration:
CA 3 h
Post exposure observation period:
None

Test conditions

Test temperature:
20 ± 1 °C
Reference substance (positive control):
yes
Remarks:
3,5-dichlorophenol

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
IC50
Effect conc.:
> 1 000 mg/L

Applicant's summary and conclusion

Conclusions:
The Gelpaste Urea has no effect on respiration inhibition of activated sludge.