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EC number: 500-078-0 | CAS number: 31923-84-9 1 - 4.5 moles propoxylated
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:
- 2009-03-31 till 2009-05-27
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- Concentration of inoculum: 30 mg/L sewage sludge
- Duration of test (contact time):
- 28 d
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
- Details on study design:
- Control Experiments:
- Endogenous activity of the inoculum: triplicate
- Reference compound ( 100 mg/L): duplicate
- Toxicity control (test item and reference compound mixed): one
Experiment with test item:
- Test volume : 250 mL
- Test apparatus : OxiTopControl System (WTW)
- Mixing : 1 magnetic stirrer per test vessel
- Incubation time : 28 days
- Incubation temperature : 22 ± 1 °C
-pH: 7.6 - 8.1 - Reference substance:
- benzoic acid, sodium salt
- Remarks:
- Purity: 100.1%
- Parameter:
- % degradation (O2 consumption)
- Value:
- 87
- Sampling time:
- 28 d
- Parameter:
- COD
- Value:
- 2 g O2/g test mat.
- Results with reference substance:
- The reference compound sodium benzoate showed 87% degradation after 14 days.
The theoretical oxygen demand of the reference compound is 1.665 mg O2/g reference compound. - Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Executive summary:
Within 28 days, a degradation of 87% was determined for Ethane-1,2 -diol, propoxylated; hence Ethane-1,2 -diol, propoxylated is considered to be "Readily Biodegradable" (Currenta, 2009).
Reference
Ethane-1,2-diol, propoxylated showed:
3 % degradation after 7 days
58 % degradation after 14 days
79 % degradation after 21 days
87 % degradation after 28 days
Description of key information
Within 28 days, a degradation of 87% was determined for Ethane-1,2 -diol, propoxylated; hence Ethane-1,2 -diol, propoxylated is considered to be "Readily Biodegradable" (Currenta, 2009).
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Within 28 days, a degradation of 87% was determined for Ethane-1,2 -diol, propoxylated; hence Ethane-1,2 -diol, propoxylated is considered to be "Readily Biodegradable" (Currenta, 2009).
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