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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Endpoint:
biodegradation in water: screening tests
Type of information:
experimental study
Adequacy of study:
key study
Study period:
no data
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Cross-referenceopen allclose all
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1976
Report date:
1976

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
The 5-day Biological Oxygen Demand (BOD5) was measured at 10 g/L (at 5, 10, 20 or 25 mL/500 mL).
The Chemical Oxygen Demand (COD) was measured by titration.
GLP compliance:
no

Test material

1
Reference substance name:
Chromate(2-), [2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-5-nitrobenzenesulfonato(3-)]-, disodium
EC Number:
274-386-6
EC Name:
Chromate(2-), [2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-5-nitrobenzenesulfonato(3-)]-, disodium
Cas Number:
70209-87-9
Molecular formula:
C32H21CrN10O11S.2Na
IUPAC Name:
Disodium-[2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-5-nitrobenzenesulfonato(3-)]-chromate(2-)
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material (migrated information):
not applicable

Study design

Oxygen conditions:
not specified
Inoculum or test system:
not specified
Details on inoculum:
no data
Duration of test (contact time):
5 d
Details on study design:
no data

Results and discussion

Preliminary study:
no data
Test performance:
no data
% Degradation
Key result
Remarks on result:
not measured/tested
Details on results:
none

BOD5 / COD results

BOD5 / CODopen allclose all
Key result
Parameter:
BOD5
Value:
27 mg O2/g test mat.
Key result
Parameter:
COD
Value:
1 021 mg O2/g test mat.
Key result
Parameter:
BOD5*100/COD
Value:
3
Results with reference substance:
no data

Any other information on results incl. tables

none

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
Under the test conditions, the substance showed low biodegradation potential.
Executive summary:

A study was conducted to evaluate the biodegradation potential of the test substance (at ca. 75% purity) via BOD5 and COD determination. The ratio of these values was equivalent to 0.03, suggesting low biodegradation potential of the substance under the test conditions.