Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Read-across from an analogue substance for which a guideline study (Klimish 1) is available.
- Reason / purpose for cross-reference:
- read-across source
- Principles of method if other than guideline:
- Read-across approach from experimental data (study according to OECD 301A) on an analogue substance.
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- 4
- Sampling time:
- 28 d
- Remarks on result:
- other: Based on a read-across from an analogue subtance.
- Details on results:
- Based on experimental results on analogue substance P0310 (4% of biodegradation in 28 days with an initial concentration of 25.1 mg/L DOC), the substance P-1057 is also considered to be not readily biodegradable. Furthermore, it is assumed that the substance P-1057 is not inhibitory to activated sludge in an estimate concentration of 102 mg/L (based on results with analogue P0310 where 55% biodegradation amounted in 13 days of exposure at concentration of 82 mg/L).
- Validity criteria fulfilled:
- not applicable
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- Based on read-across approach from analogue substance P0310, the substance P-1057 is considered to be not readily biodegradable.
- Executive summary:
Based on experimental results on analogue substance P0310 where 4% of biodegradation in 28 days with an initial concentration of 25.1 mg/L DOC was obtained in a study performed according to OECD 301A, the substance P-1057 is also considered to be not readily biodegradable. Furthermore, it is assumed that the substance P-1057 is not inhibitory to activated sludge in an estimated concentration of 102 mg/L (based on results with analogue P0310 where 55% biodegradation amounted in 13 days of exposure at concentration of 82 mg/L).
Reference
Description of key information
Key study: Based on experimental results on analogue substance P0310, the substance P-1057 was determined to be not readily biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
Key study: Based on experimental results on analogue substance P0310 (OECD 301A and GLP), the substance P-1057 was determined to be not readily biodegradable. The substance was assumed to be not inhibitory to activated sludge in an estimate concentration of 102 mg/L.
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