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EC number: 240-343-5 | CAS number: 16215-21-7
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- 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
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Based on 62.2% biodegradation in a closed bottle test, BuMP is readily biodegradable.
Reference
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 |
|||
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
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