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EC number: 204-198-1 | CAS number: 117-57-7
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:
- 1999
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Deviations:
- no
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- Municipal activated sludge from laboratory wastewater treatment plants fed with
municipal and synthetic sewage. Concentration of dry substance 30 mg/l. - Duration of test (contact time):
- 28 d
- Initial conc.:
- >= 98.4 - <= 102 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Reference substance:
- aniline
- Parameter:
- % degradation (O2 consumption)
- Value:
- > 0 - < 10
- Sampling time:
- 28 d
- Parameter:
- ThOD
- Value:
- 1 702 mg O2/g test mat.
- Results with reference substance:
- Aniline reached a plateau after 14 days at about 80%.
- Validity criteria fulfilled:
- yes
- Remarks:
- reference substance Aniline showed a degradation of about 80% after 28 days.
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- The substance is not readily biodegradable.
- Executive summary:
In a test according to OECD 301 F (manometric respiration test) the substance 3-hydroxy-2-methylquinoline-4-carboxylic acid did not show relevant signs of biodegradation. It is therefore considered to be not readily biodegradable.
Reference
Detailed results: Biodegradation in relation to the ThOD [%]
RS = reference substance, IH = inhibiton control, PC = abiotic elimination, TS = test substance
Date Days RS IH PC TS1 TS2 TS3 TS4 TS5 TS6 TS7
30.12.98 0 0 0 0 0 0 0 0 0 0 0
31.12.98 1 -3 -1 0 -4 -3 -4 -3 -4 -4 -3
1.1.99 2 -4 -2 0 -4 -4 -5 -5 -5 -4 -4
2.1.99 3 -5 -2 0 -5 -4 -7 -6 -6 -4 -5
3.1.99 4 -4 5 0 -7 -5 -8 -6 -6 -4 -5
4.1.99 5 -1 5 --- -6 -4 -7 -7 -6 -3 -6
5.1.99 6 8 4 --- -6 -5 -8 -8 -6 -3 -7
6.1.99 7 47 6 --- -6 -4 -8 -8 -6 -2 -6
7.1.99 8 60 7 --- -6 -4 -9 -8 -6 -2 -7
8.1.99 9 62 9 --- -7 -5 -11 -9 -7 -2 -8
9.1.99 10 68 10 --- 7 -5 -11 -9 -7 -1 -8
10.1.99 11 70 12 --- -7 -5 -11 -10 -8 -1 -7
11.1.99 12 71 13 --- 7 -5 -12 -10 -8 0 -8
12.1.99 13 72 15 --- -6 -4 -12 -10 -8 1 -8
13.1.99 14 72 16 --- -7 -5 -11 -10 -8 1 -9
14.1.99 15 72 20 --- -5 -4 -11 -10 -8 2 -9
15.1.99 16 73 32 --- -5 -4 -11 -10 -8 2 -9
16.1.99 17 73 33 --- -6 -5 -12 -11 -8 2 -9
17.1.99 18 74 35 --- -6 -5 -12 -11 -8 3 -9
18.1.99 19 73 35 --- -5 -5 -12 -12 -8 3 -10
19.1.99 20 74 35 --- -5 -5 -12 -12 -8 4 -9
20.1.99 21 74 36 --- -5 -6 -13 -12 -8 4 .9
21.1.99 22 74 35 --- -4 -5 -14 -12 -8 4 -10
22.1.99 23 74 36 --- -5 -6 -14 -13 -9 4 -10
23.1.99 24 74 36 --- -4 -6 -14 -13 -9 5 -10
24.1.99 25 74 36 --- -3 -6 -14 -13 -9 5 -11
25.1.99 26, 74 36 --- -4 -7 -14 -13 -9 5 -0
26.1.99 27 74 36 --- -3 -8 -15 -14 -9 5 -11
27.1.99 28 75 36 --- - 3 -6 -15 -13 -9 5 -11
Description of key information
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
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