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EC number: 216-644-2 | CAS number: 1633-22-3
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:
- weight of evidence
- Justification for type of information:
- See read-across justification report, attached to "biodegradation in water: screening tests" section.
- Reason / purpose for cross-reference:
- read-across source
- Parameter:
- other: % degradation (based on ThOD)
- Value:
- 3.19
- Sampling time:
- 28 d
- Details on results:
- The biodegradability of DPX-C (Di-cloro-Di-p-Xililene) was 2.05, 2.05, 2.28 and 3.19% (based on ThOD, i.e., 2.194 mg O2/mg) on day 7, 14, 21, and 28, respectively. After 28 day of analysis, oxygen depletion was < 1.5 mg/L in the inoculum blank. The percent biodegradation data revealed that the DPX-C (Di-cloro-Di-p-Xililene) was not readily biodegradable.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- Dibenzetano is estimated to be not ready biodegradable.
- Executive summary:
Dibenzetano is estimated to be not ready biodegradable from the result of the source study (see read across justification report).
Reference
Description of key information
The biodegradability of DPX-C (Di-cloro-Di-p-Xililene) was 2.05, 2.05, 2.28 and 3.19% (based on ThOD, i.e., 2.194 mg O2/mg) on day 7, 14, 21, and 28, respectively. After 28 day of analysis, oxygen depletion was < 1.5 mg/L in the inoculum blank. The percent biodegradation data revealed that the DPX-C (Di-cloro-Di-p-Xililene) was not readily biodegradable.
Biodegradation results of DPX-C were used in read-across also for the evaluation of the biodegradation of Dibenzetano (see also read-across justification).
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
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