Registration Dossier
Registration Dossier
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EC number: 907-132-6 | CAS number: -
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- supporting study
- Study period:
- 28 April - 1 October 1982 (7 tests were conducted beginning 28 April, 28 May, 18 June, 16 July, 12 August, 1 September and 1 October)
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Non-GLP study; Conducted following Standard Methods, APHA, 1980.
- Justification for type of information:
- Read across is based on the category approach. Please refer to attached category document.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 983
- Report date:
- 1983
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: Standard Methods for the Examination of Water and Wastewater, 15th Ed., American Public Health Association, Washington, DC, 1980.
- GLP compliance:
- no
Test material
- Reference substance name:
- 2,2'-(ethylenedioxy)diethanol
- EC Number:
- 203-953-2
- EC Name:
- 2,2'-(ethylenedioxy)diethanol
- Cas Number:
- 112-27-6
- Molecular formula:
- C6H14O4
- IUPAC Name:
- 2,2'-[ethane-1,2-diylbis(oxy)]diethanol
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- other: acclimated or unacclimated microorganisms
- Duration of test (contact time):
- 20 d
Results and discussion
% Degradation
- Value:
- 86
- Sampling time:
- 20 d
- Remarks on result:
- other: using acclimated organisms
- Details on results:
- See Table 1 for summary of results. See attached Tables for testing with unacclimated organisms done on specific dates.
Any other information on results incl. tables
Table 1: Summary of Biodegradation Data
Product |
Theoretical oxygen demand, mg O2/mg compound, measured as COD |
Theoretical oxygen demand, mg O2/mg compound, calculated |
Biooxidation, % (BOD/ThOD x 100), day 5 |
Biooxidation, % (BOD/ThOD x 100), day 10 |
Biooxidation, % (BOD/ThOD x 100), day 20 |
Triethylene glycol |
1.55 |
1.60 |
3 (32) |
9 (64) |
30 (86) |
Values in parenthesis represent biodegradation using acclimated micro-organisms.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- Day 20 bio-oxidation values for triethylene glycol were found to average 30% (range 15-39) with unacclimated organisms and 86% with acclimated organisms.
- Executive summary:
Day 20 bio-oxidation values for triethylene glycol were found to average 30% (range 15-39) with unacclimated organisms and 86% with acclimated organisms.
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