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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
1988
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1988
Report date:
1988

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
Deviations:
not specified
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
5-amino-1,3-dihydro-2H-benzimidazol-2-one
EC Number:
202-401-8
EC Name:
5-amino-1,3-dihydro-2H-benzimidazol-2-one
Cas Number:
95-23-8
Molecular formula:
C7H7N3O
IUPAC Name:
5-amino-1,3-dihydro-2H-benzimidazol-2-one

Sampling and analysis

Analytical monitoring:
not specified

Test organisms

Test organisms (species):
activated sludge of a predominantly domestic sewage

Study design

Test type:
static
Water media type:
not specified
Limit test:
yes
Total exposure duration:
3 h

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
EC0
Effect conc.:
> 690 mg/L
Nominal / measured:
nominal
Conc. based on:
not specified
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate

Applicant's summary and conclusion

Executive summary:

EC0 for bacteria tox of the test item EC> 690 mg/L