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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:
February 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study done to guideline, in compliance with GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report date:
2015

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Deviations:
no
Principles of method if other than guideline:
An optional toxicity control as suggested by OECD guideline 301F was not performed. The validity of the study is not adversely affected.
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
6-isopropyl-3-methylcyclohex-2-enone
EC Number:
201-942-7
EC Name:
6-isopropyl-3-methylcyclohex-2-enone
Cas Number:
89-81-6
Molecular formula:
C10H16O
IUPAC Name:
6-isopropyl-3-methylcyclohex-2-enone
Test material form:
gas under pressure: refrigerated liquefied gas

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Duration of test (contact time):
48 d
Initial test substance concentration
Initial conc.:
30 mg/L
Based on:
test mat.

Results and discussion

% Degradation
Parameter:
% degradation (O2 consumption)
Value:
86
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Executive summary:

Piperiton Racemic for Neo Extra undergoes 86% biodegradation after 28 days in the test conditions. The 10 -day window criterion is also fulfilled (13% biodegradation on day 3 and 82% on day 13).

Piperiton Racemic for Neo Extra did not inhibit the intrinsic respiration of the inoculum at the test concentration and was therefore considered to be non-toxic to the inoculum at the test concentration.

Thus, Piperiton Racemic for Neo Extra should be regarded as readily biodegradable according to this test.