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Environmental fate & pathways

Biodegradation in water: screening tests

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Endpoint:
biodegradation in water: screening test, other
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
July 1974
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
according to
Guideline:
other: Inhouse SOP (method A.16) validated by Ciba which is comparable to standard guideline.
Deviations:
no
Principles of method if other than guideline:
In house SOP (method A.16) validated by Ciba which is comparable to standard guideline.
GLP compliance:
no
Oxygen conditions:
not specified
Inoculum or test system:
not specified
Initial conc.:
20 mg/L
Based on:
test mat.
Preliminary study:
No data
Test performance:
No data
Remarks on result:
not measured/tested
Parameter:
COD
Value:
688.28 other: mg/g O2

Chloride: 31.18 mg COD/Cl

pH=5.75

Interpretation of results:
other: COD determination
Conclusions:
COD of FAT 40062/A was determined to be 688.28 mg/g O2.
Executive summary:

The COD of FAT 40062/A was determined to be 688.28 mg/g O2.

Endpoint:
biodegradation in water: screening test, other
Type of information:
experimental study
Adequacy of study:
key study
Study period:
5 August 1974 to 5 September 1974
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: This study was conducted prior to GLP and test guidelines
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
GLP compliance:
no
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material (migrated information):
None
Oxygen conditions:
not specified
Inoculum or test system:
not specified
Details on inoculum:
No data
Initial conc.:
20 mg/L
Based on:
test mat.
Details on study design:
No data
Test performance:
No data
Parameter:
% degradation (TOC removal)
Value:
31
Sampling time:
31 d
Remarks on result:
other: Other details were not specified
Validity criteria fulfilled:
no
Interpretation of results:
other: TOC determined
Conclusions:
Total organic carbon (TOC) of FAT 40062/A is found to be 31 %.
Executive summary:

FAT 40062/A was assessed for bioelimination and was found to be 31 % for 20 mg/l test substance concentration. FAT 40062/A is not inherently biodegradable, the biodegradation after 31 days is found to be 31 %.

Endpoint:
biodegradation in water: screening test, other
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
July 1974
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
according to
Guideline:
other: Inhouse SOP (method A.15) validated by Ciba which is comparable to standard guideline.
Deviations:
no
Principles of method if other than guideline:
In house SOP (method A.15) validated by Ciba which is comparable to standard guideline.
GLP compliance:
no
Oxygen conditions:
not specified
Inoculum or test system:
not specified
Duration of test (contact time):
5 d
Remarks on result:
other: data not available
Parameter:
BOD5
Value:
42 mg O2/g test mat.
Interpretation of results:
other: BOD5 determination
Conclusions:
BOD5 of FAT 40062/A was determined to be 42 mg O2/g.
Executive summary:

The BOD5 of FAT 40062/A was determined to be 42 mg O2/g.

Description of key information

Total organic carbon (TOC) of Reactive Red 065 was found to be 31 % after 31 days. The BOD5 was fond to be 42 mg O2/g while COD was 688 mg O2/g; so the BOD5/COD ratio calculated as 0.06. Based on this value Reactive Red 065 should be considered as not biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
not biodegradable
Type of water:
freshwater

Additional information