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EC number: 416-740-6 | 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)
- Rationale for reliability incl. deficiencies:
- other: Reliability rating was 1 because study was carried out under GLP and test method used was equivalent to OECD 301B test method. Also study was well-documented.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Duration of test (contact time):
- 28 d
- Initial conc.:
- 10 other: mg/L carbon for ThCO2
- Based on:
- other: mg carbon per L
- Initial conc.:
- 20 other: mg/L carbon for ThCO2
- Based on:
- other: mg carbon per L
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 33.2
- Sampling time:
- 28 d
- Remarks on result:
- other: at 10 mg C/L conc
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 28.9
- Sampling time:
- 28 d
- Remarks on result:
- other: at 20 mg C/L conc
- Details on results:
- % Aerobic Ready Biodegradation Results on Day 1, 3, 6, 10, 14, 21 , 28 days were respectively,
0, 0.4, 2.6, 6.4, 10.0, 23.7, 33.2% for the test material at 10 mg C/L
0.3, 0.9, 2.3, 6.0, 10.5, 22.0, 28.9% for the test material at 20 mg C/L
16.6, 56.2, 75.6, 79.5, 81.3, 83.4, 84.4% for sodium benzoate (positve control) at 20 mg C/L -
sodium pass 10-day window criterion and met readily biodegradable classification - Results with reference substance:
- Sodium benzoate, the reference positive control substance, was biodegraded to 84.4% in 28 days and passed the 10-day window criterion for readily biodegradability
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- inherently biodegradable
- Conclusions:
- The test substance was found to biodegrade in water to the extent of 28.9 to 33.2% in 28 days in a standard CO2 evolution test method (equivalent to OECD 301B test). It was not readily biodegradable. However, overall, it meets the OECD criteria of being classified as "inherently biodegradable."
- Executive summary:
The test substance was found to biodegrade in water to the extent of 28.9 to 33.2% in 28 days in a standard CO2 evolution test method (equivalent to OECD 301B test). It was not readily biodegradable. However, overall, it meets the OECD criteria of being classified as "inherently biodegradable."
Reference
Description of key information
The test substance was found to biodegrade in water to the extent of 28.9 to 33.2% in 28 days in a standard CO2 evolution test method (equivalent to OECD 301B test). It was not readily biodegradable. However, overall, it meets the OECD criteria of being classified as "inherently biodegradable."
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable
Additional information
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