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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study (GLP), detailed documentation not available (lack on information on kinetics and the 10-day window)

Data source

Reference
Reference Type:
secondary source
Title:
Unnamed
Year:
1993

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Lactonitrile
EC Number:
201-163-2
EC Name:
Lactonitrile
Cas Number:
78-97-7
Molecular formula:
C3H5NO
IUPAC Name:
2-hydroxypropanenitrile
Details on test material:

2-Hydroxypropanenitrile
Purity: > 99 %

Study design

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

Results and discussion

% Degradation
Parameter:
% degradation (DOC removal)
Value:
56 - 76
Sampling time:
28 d
Details on results:
RS-Freetext:
Degree of degradation after 28 days:
56, 76 and 66% from BOD
5, 71, 76% from TOC analysis
100, 100 and 100% from GC analysis

Applicant's summary and conclusion

Interpretation of results:
readily biodegradable