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Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2004
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
2008
Report Date:
2008

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
Deviations:
not specified
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: crystalline

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
100 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Reference substance
Reference substance:
aniline

Results and discussion

% Degradationopen allclose all
Key result
Parameter:
% degradation (O2 consumption)
Value:
>= 92 - <= 100
Sampling time:
28 d
Key result
Parameter:
% degradation (TOC removal)
Value:
>= 98 - <= 99
Sampling time:
28 d
Key result
Parameter:
% degradation (test mat. analysis)
Value:
100 - 100
Sampling time:
28 d

Any other information on results incl. tables

Biodegradability of Aniline (control substance) after 7 days and 14 days are 66% and 75% respectively.
No converted products were observed.

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
readily biodegradable
Conclusions:
This study determined that p-toluic acid is readily biodegradable under the conditions observed.