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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
key study
Study period:
1989
Reliability:
4 (not assignable)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1989
Report date:
1989

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
Deviations:
no
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
4-diazo-3,4-dihydro-7-nitro-3-oxonaphthalene-1-sulphonic acid
EC Number:
264-347-1
EC Name:
4-diazo-3,4-dihydro-7-nitro-3-oxonaphthalene-1-sulphonic acid
Cas Number:
63589-25-3
Molecular formula:
C10H5N3O6S
IUPAC Name:
4-diazo-3,4-dihydro-7-nitro-3-oxonaphthalene-1-sulphonic acid
Test material form:
other: solid

Test organisms

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

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
3 h

Results and discussion

Effect concentrationsopen allclose all
Duration:
3 h
Dose descriptor:
IC50
Effect conc.:
> 100 mg/L
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate
Duration:
3 h
Dose descriptor:
other: IC8
Effect conc.:
100 mg/L
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate

Applicant's summary and conclusion

Conclusions:
The IC50 was determined to be > l00 mg/l.