Registration Dossier
Registration Dossier
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EC number: 940-514-0 | CAS number: -
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
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- - Storage conditions: The test item was stored in the test facility in a tightly closed vessel at room temperature (20 ± 5 °C).
- Duration of test (contact time):
- ca. 28 d
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- ca. 45.6
- Sampling time:
- 28 d
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- ca. 49.4
- Sampling time:
- 28 d
- Key result
- Parameter:
- BOD5
- Value:
- ca. 100.25 other: mgO2/L
- Results with reference substance:
- The degree of biodegradation reached 48 % after 28 days.
The 10-day-window began on day 10 (this is stated as lag phase), at its end (day 20),
38.8 % were reached, staying below the pass level of 60 % given in the OECD guideline.
The degradation phase is defined as interval between the end of the lag phase and the reaching of 90 %. This was reached on day 23.
The degradation phase was from day 10 – day 23 (42.75 %).
Therefore, when applying the 10-day-window, the test item Naphtha/Light Oil is not readi-ly biodegradable following OECD 301F/EU C.4-D.
Because the test item is a mixture the 10-day-window does not have to be taken into ac-count. As degradation missed 60% in the course of the test, Naphtha/Light Oil is consid-ered as not readily biodegradable within 28 days, as well. - Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- As degradation missed 60% in the course of the test, Naphtha/Light Oil is considered as not readily biodegradable within 28 days, as well.
Reference
Description of key information
Key value for chemical safety assessment
- Biodegradation in water:
- not biodegradable
- Type of water:
- freshwater
Additional information
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