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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: screening tests
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Standard method (Reliability commented in OECD SIDS: The authors did not address or correct for potential endogenous propionic acid production by microorganisms in the inoculum, which could have increased the overall amount of propionate present in the inoculum)

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Effect of chemical structure on the biodegradability of aliphatic acids and alcohols
Author:
Dias FF, Alexander M
Year:
1971
Bibliographic source:
Applied Microbiology 22: 1114-1118
Reference Type:
secondary source
Title:
Dossier n-Propionic Acid
Author:
OECD SIDS
Year:
2007
Bibliographic source:
OECD, July 2007

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Method: Warburg respirometer test
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Propionic acid
EC Number:
201-176-3
EC Name:
Propionic acid
Cas Number:
79-09-4
Molecular formula:
C3H6O2
IUPAC Name:
propionic acid
Details on test material:
Purity not specified

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
sewage, domestic, non-adapted
Duration of test (contact time):
30 d
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Value:
60
Sampling time:
2 d
Parameter:
% degradation (O2 consumption)
Value:
71
Sampling time:
5 d
Parameter:
% degradation (O2 consumption)
Value:
73
Sampling time:
10 d
Parameter:
% degradation (O2 consumption)
Value:
74
Sampling time:
30 d

Applicant's summary and conclusion

Interpretation of results:
other: according to OECD SIDS propionic acid is stated as readily biodegradable