Registration Dossier
Registration Dossier
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EC number: 295-371-0 | CAS number: 92044-91-2
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:
- 19 March - 16 April 1999
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)
- Deviations:
- no
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- Source of activated sludge: Fresh activated sludge was collected from a municipal sewage treatment plant: Hochdahl, Germany.
- Duration of test (contact time):
- 28 d
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Test temperature: 22 +/- 1
- Continuous darkness: yes
TEST SYSTEM
- Number of culture flasks/concentration: 3
CONTROL AND BLANK SYSTEM
- Inoculum blank: 3
- Abiotic sterile control: no
- Toxicity control: yes
- Reference substance:
- acetic acid, sodium salt
- Parameter:
- % degradation (O2 consumption)
- Value:
- 102
- Sampling time:
- 28 d
- Details on results:
- Within the 10-day time window the 60% level was passed. Therefore, the test substance is regarded as readily biodegradable.
- Results with reference substance:
- Degradation: 85 % after 14 days, 60% pass level was reached.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
Reference
Description of key information
Readily biodegradable: 102% (O2 consumption) in 28 days (EU method C.4 D)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
The ready biodegradability of Fatty acids, C8-10, oxybis(2-hydroxy-3,1-propanediyl) esters (CAS 92044-91-2) was investigated according to EU method C.4 D (equivalent to OECD 301 F). The study was conducted under aerobic conditions using domestic activated sludge as inoculum. During the incubation time of 28 days the degradation was followed by determining the O2 consumption. A degradation of 102 % was determined at test termination. The 10-day window criterion was met. Hence, Fatty acids, C8-10, oxybis(2-hydroxy-3,1-propanediyl) esters can be considered as readily biodegradable according to OECD criteria.
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