Registration Dossier

Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
not specified
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Deviations:
not specified
GLP compliance:
not specified
Remarks:
the test was conducted in an academic setting without GLP certification
Oxygen conditions:
aerobic
Inoculum or test system:
sewage, predominantly domestic, non-adapted
Details on inoculum:
- Source of inoculum/activated sludge: STP of Lüneburg, Germany (144,000 inhabitant
equivalents)
- Initial cell/biomass concentration: two drops of effluent per L
Duration of test (contact time):
28 d
Key result
Parameter:
% degradation (O2 consumption)
Value:
62.2
St. dev.:
0.5
Sampling time:
28 d
Remarks on result:
other: OECD 301D (CBT), Exp. 3
Key result
Parameter:
% degradation (O2 consumption)
Value:
41
St. dev.:
0.2
Sampling time:
28 d
Remarks on result:
other: OECD 301D (CBT) Exp. 4
Key result
Parameter:
% degradation (O2 consumption)
Value:
17.8
St. dev.:
4
Sampling time:
28 d
Remarks on result:
other: OECD 301F (MRT), Exp. 1

Biodegradation test results obtained in the present study. For each experiment the % O2consumption in the two parallel bottles is given, and for valid results the average ±SD, otherwise the criterion rendering a result invalid.

Compound name

(abbreviation)

[CAS-RN]

Experiment number

OECD 301D (CBT)

OECD 301F (MRT)

O2Consumption/

ThOD [%]

Average in a valid experiment ±SD

O2Consumption/ ThOD [%]

Average in a valid experiment ±SD

Butyl 3-mercaptopropionate

(BuMP)

[16215-21-7]

1

55.6, 29.0

not valid,

criterion 1

15.0, 20.7

17.8 ±4.0

2

57.4, 60.3

not valid,

criterion 4

3

61.9, 62.5

62.2 ±0.5

4

40.8, 41.1

41.0 ±0.2

 

Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Conclusions:
Based on 62.2% biodegradation in a closed bottle test, BuMP is readily biodegradable.

Description of key information

Based on 62.2% biodegradation in a closed bottle test, BuMP is readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable
Type of water:
freshwater

Additional information

Categories Display