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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
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
4-[(1E,3S)-3-ethenyl-3,7-dimethylocta-1,6-dienyl]phenol
EC Number:
685-515-4
Cas Number:
10309-37-2
Molecular formula:
C18H24O
IUPAC Name:
4-[(1E,3S)-3-ethenyl-3,7-dimethylocta-1,6-dienyl]phenol

Study design

Inoculum or test system:
natural water
Details on inoculum:
The river water collected from Daman Ganga River was used as inoculum. The river water was filtered through Whatman No 1 filter paper and incubated at test temperature 20 ± 1℃ in incubator for one day.
Duration of test (contact time):
ca. 28 d
Initial test substance concentrationopen allclose all
Initial conc.:
ca. 2 mg/L
Based on:
test mat.
Initial conc.:
ca. 7.98 mg/L
Based on:
other: dissolved oxygen
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Reference substance
Reference substance:
other: Potassium hydrogen phthalate

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Value:
ca. 22.82
Sampling time:
7 d
Parameter:
% degradation (O2 consumption)
Value:
ca. 27.93
Sampling time:
14 d
Parameter:
% degradation (O2 consumption)
Value:
ca. 36.96
Sampling time:
21 d
Parameter:
% degradation (O2 consumption)
Value:
ca. 55.7
Sampling time:
28 d

BOD5 / COD results

Results with reference substance:
7d, 34.72%
14d, 66.89%
21d, 77.62%
28d, 87.66%

Any other information on results incl. tables

The degradation for reference substance (toxicity control) on 7d, 14d, 21d, and 28d were 36.26, 69.45, 79.32 and 90.21%, respectively. So no adverse effects of test substance on inoculum.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
other: not readily biodegradable