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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
Study period:
1991
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
publication
Title:
BUA-Stoffbericht 81 - Ameisensäure, Formiate
Author:
n.a.
Year:
1992
Bibliographic source:
Beratergremium für Altstoffe (BUA) der Gesellschaft Deutscher Chemiker, S.Hirzel Wissenschaftliche Verlagsgesellschaft

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 E (Ready biodegradability: Modified OECD Screening Test)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Formic acid
EC Number:
200-579-1
EC Name:
Formic acid
Cas Number:
64-18-6
Molecular formula:
CH2O2
IUPAC Name:
formic acid
Constituent 2
Chemical structure
Reference substance name:
Water
EC Number:
231-791-2
EC Name:
Water
Cas Number:
7732-18-5
Molecular formula:
H2O
IUPAC Name:
Water
Test material form:
liquid

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, adapted
Duration of test (contact time):
ca. 14 d
Initial test substance concentration
Initial conc.:
ca. 72 mg/L
Based on:
DOC
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
DOC removal

Results and discussion

% Degradation
Key result
Parameter:
% degradation (DOC removal)
Value:
ca. 98
Sampling time:
1 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Conclusions:
The Substance is ready biodegradeble.
Executive summary:

In OECD screening tests the testsubstance showed a degradation of > 90 %.

In other tests under aerobic conditions with differend types of Water 60 - 95 % of the TOC were measured.

Under anaerobic conditions a degradation of 89 % was determined.