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Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Link to relevant study record(s)

biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
according to guideline
other: other
Principles of method if other than guideline:
BOD (Standard Methods for the Examination of Water and Wastewater. 1971. 13th Ed. American Public Health Association, New York, NY)
GLP compliance:
not specified
Oxygen conditions:
Inoculum or test system:
sewage, domestic, non-adapted
Duration of test (contact time):
ca. 20 d
Initial conc.:
ca. 3 mg/L
Based on:
test mat.
Key result
% degradation (O2 consumption)
ca. 64
Sampling time:
5 d
Key result
% degradation (O2 consumption)
ca. 76
Sampling time:
10 d
Key result
% degradation (O2 consumption)
ca. 81
Sampling time:
15 d
Key result
% degradation (O2 consumption)
ca. 75
Sampling time:
20 d
Validity criteria fulfilled:
Interpretation of results:
readily biodegradable
Rapidly biodegradable according to GHS.

Description of key information

Readily biodegradable of 1 -propanol based on BOD method

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

As the target substance hydrolyzes rapidly, the intrinsic properties lies in the hydrolysis products. The 1 -propanol degraded more than 60% after 5 days in a BOD method (Price, et al. 1974).


The inorganic product, Zirconium dioxide, was not considered further in this report as biodegradation and partition coefficient assessments did not apply.


Based on these findings, the target substance was considered readily biodegradable.