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Environmental fate & pathways

Biodegradation in water: screening tests

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Reference
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
1980
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Study conducted according to OECD Guideline 301 C but with deviations: no detail on material and methods
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
Deviations:
yes
Remarks:
no detail on material and methods
Principles of method if other than guideline:
Not applicable
GLP compliance:
not specified
Specific details on test material used for the study:
No data
Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge (adaptation not specified)
Details on inoculum:
- Concentration of sludge: 30 ppm
Duration of test (contact time):
14 d
Initial conc.:
100 other: ppm
Based on:
test mat.
Details on study design:
No data
Preliminary study:
No data
Test performance:
No data
Parameter:
% degradation (O2 consumption)
Value:
>= 41 - <= 98
Sampling time:
14 d
Details on results:
- Indirect analysis (BOD): 41, 81 and 98%
- Direct analysis (GC): 100%
- Direct analysis (TOC): 50, 73 and 81%
Results with reference substance:
No data

None

Validity criteria fulfilled:
not specified
Interpretation of results:
readily biodegradable
Conclusions:
Under the test conditions, the test item was readily biodegradable.
Executive summary:

In a ready biodegradation study performed according to OECD Guideline 301 C, the test item was tested at concentrations of 100 ppm and the inoculum was activated sludge (30 ppm). The degradation of the test material was assessed by the determination of the oxygen consumption.

At 100 ppm test concentration, 41-98% degradation by biochemical oxygen demand was reached in 14 days.

 

Under the test conditions, the test item was readily biodegradable.

 

Description of key information

Under the test conditions, the compound was found to be readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

In a ready biodegradation study performed according to OECD Guideline 301 C, the test item was tested at concentrations of 100 ppm and the inoculum was activated sludge (30 ppm). The degradation of the test material was assessed by the determination of the oxygen consumption.

At 100 ppm test concentration, 41-98% degradation by biochemical oxygen demand was reached in 14 days.

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