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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:
weight of evidence
Study period:
1994
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:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
Deviations:
yes
Remarks:
No details 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 mg/L
Duration of test (contact time):
28 d
Initial conc.:
100 mg/L
Based on:
test mat.
Details on study design:
No data
Preliminary study:
No data
Test performance:
No data
Parameter:
% degradation (O2 consumption)
Value:
94
Sampling time:
28 d
Details on results:
- Indirect analysis (BOD): 94%
- Direct analysis (GC): 100%
Results with reference substance:
No data

None

Validity criteria fulfilled:
not specified
Interpretation of results:
readily biodegradable
Conclusions:
Under the test conditions, the chemical substance was determined to be ready biodegradable.
Executive summary:

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

At 100 mg/L test concentration, 94% degradation (biochemical oxygen demand) was reached in 28 days.

 

Under the test conditions, the substance was determined to be ready biodegradable.

 

Description of key information

Under the test conditions of a study performed based on OECD 301 C guideline, camphor 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, (D,L)-camphor was tested at concentrations of 100 mg/L and the inoculum was activated sludge (30 mg/L). The degradation of the test material was assessed by the determination of the oxygen consumption.

At 100 mg/L test concentration, 94% degradation (biochemical oxygen demand) was reached in 28 days.