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EC number: 231-225-4 | CAS number: 7452-79-1
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:
- 27 June to 17 August 2000
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
- Deviations:
- no
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: secondary effluent of a domestic sewage treatment plant (Kläranlage Odenthal)
- Concentration of effluents in reaction mixture: 5 ml/l
- Preconditioning: aeration for 4 days
- Treatment given: separation of coarse particles by filtration - Duration of test (contact time):
- ca. 28 d
- Initial conc.:
- 2.9 mg/L
- Based on:
- test mat.
- Reference substance:
- other: Sodium benzoate
- Preliminary study:
- No details provided in report
- Parameter:
- % degradation (DOC removal)
- Value:
- > 37 - < 39
- St. dev.:
- 1
- Sampling time:
- 7 d
- Parameter:
- % degradation (DOC removal)
- Value:
- > 50 - < 55
- St. dev.:
- 2
- Sampling time:
- 14 d
- Parameter:
- % degradation (DOC removal)
- Value:
- > 60 - < 64
- St. dev.:
- 2
- Sampling time:
- 21 d
- Parameter:
- % degradation (DOC removal)
- Value:
- > 65 - < 66
- St. dev.:
- 0.5
- Sampling time:
- 28 d
- Details on results:
- Within the test period of 28 days, a degradation of 66% was determined for Ethyl Methylbutyrate-2.
Ethyl Methylbutyrate-2 has to be classified as “Readily Biodegradable’’. - Results with reference substance:
- In parallel preparations with the reference substance sodium benzoate a degradation of 78% was achieved within 14 days.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Within the test period of 28 days, a degradation of 66% was determined for Ethyl Methylbutyrate-2.
Ethyl Methylbutyrate-2 has to be classified as “Readily Biodegradable’. - Executive summary:
Within the test period of 28 days, a degradation of 66% was determined for Ethyl Methylbutyrate-2. Ethyl Methylbutyrate-2 has to be classified as “Readily Biodegradable’.
Reference
Description of key information
EMB was determined to be biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Within the test period of 28 days, a degradation of 66% was determined for Ethyl Methylbutyrate-2. Ethyl Methylbutyrate-2 may therefore be considered to be ''Readily Biodegradable''.
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