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EC number: 238-692-3 | CAS number: 14643-87-9
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:
- weight of evidence
- Study period:
- 03 Jan 1991 - 31 Jan 1991 (experimental)
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- only draft report available
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- other: supernatant filtered from activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): activated sewage sludge bacteria from the aeration stage of a sewage plant treating predominantly domestic sewage
- Preparation of inoculum for exposure: the sample was allowed to settle and the supernatant filtered through a Whatman GFA filter paper (first 250 mL discarded) - Duration of test (contact time):
- 28 d
- Initial conc.:
- 3 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Test temperature: 20 +/- 1 °C
TEST SYSTEM
- Number of culture flasks/concentration: 2
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes
- Abiotic sterile control: yes - Reference substance:
- benzoic acid, sodium salt
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- > 80 - < 90
- Sampling time:
- 28 d
- Details on results:
- Kinetic of test substance (in %):
= 56 after 5 days
= 64 after 15 days
= 81 after 28 days - Results with reference substance:
- 88% degradation after 28 days
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Under the conditions, of the test, acrylic acid was readily biodegradable according to OECD criteria (14 d window criterion as given in OECD test guideline fulfilled). The degree of biodegradation reached 80-100% within 14 d.
- Executive summary:
A study was conducted to determine readily biodegradability of the test substance according to OECD Guideline 301D. Under the conditions, of the test, acrylic acid was readily biodegradable according to OECD criteria (14 d window criterion as given in OECD test guideline fulfilled). The degree of biodegradation reached 80-100% within 14 d (BAMM, 1991).
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 31 May 1995 - 09 June 1995
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-A (Determination of the "Ready" Biodegradability - Dissolved Organic Carbon (DOC) Die-Away Test)
- Version / remarks:
- 92/69/EEC, part II C 4-A
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): activated sludge taken from a municipal waste water treatment plant (Marl-Ost, Germany).
- Concentration of sludge: 3.8 g/l - Duration of test (contact time):
- 9 d
- Initial conc.:
- 15.08 mg/L
- Based on:
- DOC
- Parameter followed for biodegradation estimation:
- DOC removal
- Details on study design:
- TEST CONDITIONS
- Test temperature: 21.8 - 22 °C
TEST SYSTEM
- Number of culture flasks/concentration: 2
- Measuring equipment: Shimadzu
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes
- Reference control: yes - Reference substance:
- benzoic acid, sodium salt
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- > 90 - < 100
- Sampling time:
- 9 d
- Details on results:
- Kinetic of test substance (in %):
= 2 after 2 days
= 92 after 6 days
= 94 after 7 days
= 95 after 9 days - Results with reference substance:
- Degradation >70 % within 14 days
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Under the conditions of the test, acrylic acid was readily biodegradable according to OECD criteria (10 d window fulfilled). The degree of biodegradation reached 90-100% within 9 d.
- Executive summary:
A study was conducted to determine readily biodegradability of the test substance according to EU Method C.4-A. Under the conditions of the test, acrylic acid was readily biodegradable according to OECD criteria (10 d window fulfilled). The degree of biodegradation reached 90-100% within 9 d (Huels, 1995).
- Endpoint:
- biodegradation in water: ready biodegradability
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance is inorganic
Referenceopen allclose all
Under the conditions, of the test, acrylic acid was readily biodegradable according to OECD criteria (14 -day window criterion as given in OECD test guideline fulfilled).
Under the conditions of the test, acrylic acid was readily biodegradable according to OECD criteria (10 -day window fulfilled).
Description of key information
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
No biodegradation testing with zinc is required as the substance is inorganic.
Acrylic acid studies
Study 1:
A study was conducted to determine readily biodegradability of the test substance according to EU Method C.4-A. Under the conditions of the test, acrylic acid was readily biodegradable according to OECD criteria (10 d window fulfilled). The degree of biodegradation reached 90-100% within 9 d (Huels, 1995).
Study 2:
A study was conducted to determine readily biodegradability of the test substance according to OECD Guideline 301D. Under the conditions, of the test, acrylic acid was readily biodegradable according to OECD criteria (14 d window criterion as given in OECD test guideline fulfilled). The degree of biodegradation reached 80-100% within 14 d (BAMM, 1991).
[Type of water: freshwater]
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