Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
1990
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1990
Report date:
1990

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: Richtlinie 79/831/EWG (Teil C)
Qualifier:
according to guideline
Guideline:
other: DIN 38 409, Teil 52
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
Version / remarks:
Evaluation was performed analogously to MITI (I) Test (OECD 301 C)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
4-(2-phenylpropan-2-yl)phenyl 4-oxo-3-(λ⁵-diazynylidene)-3,4-dihydronaphthalene-1-sulfonate
Cas Number:
23121-00-8
Molecular formula:
C25H20N2O4S
IUPAC Name:
4-(2-phenylpropan-2-yl)phenyl 4-oxo-3-(λ⁵-diazynylidene)-3,4-dihydronaphthalene-1-sulfonate
Test material form:
solid

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic (adaptation not specified)
Details on inoculum:
- Source of inoculum/activated sludge: Sewage Treatment Plant Sindlingen, Frankfurt am Main, Germany
- Preparation of inoculum for exposure: washed 1x with nutrient medium
- Concentration of sludge: 26.1 mg/L (dw)
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
173 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Details on study design:
TEST CONDITIONS
- Test temperature: 22 °C
- pH: 7.0
- pH adjusted: Yes, the pH was adjusted from 6.4 to 7.0 using 0.1 M NaOH.

TEST SYSTEM
- Measuring equipment: Oxygen demand was determined manometrically using the Warburg-, Hach-, BSB- instrument or a respirometer (Sapromat)

Results and discussion

% Degradation
Parameter:
% degradation (O2 consumption)
Value:
4
Sampling time:
28 d
Details on results:
The measured BOD was 320 mg O2/L.

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
not readily biodegradable
Conclusions:
The test substance was not readily biodegradable.