Registration Dossier
Registration Dossier
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 700-291-0 | CAS number: 1000701-92-7
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- migrated 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: Guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 990
- Report date:
- 1990
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 E (Ready biodegradability: Modified OECD Screening Test)
- GLP compliance:
- no
Test material
- Reference substance name:
- 2-hexyloxyethanol
- EC Number:
- 203-951-1
- EC Name:
- 2-hexyloxyethanol
- Cas Number:
- 112-25-4
- Molecular formula:
- C8H18O2
- IUPAC Name:
- 2-(hexyloxy)ethanol
- Details on test material:
- - Name of test material (as cited in study report): N-Hexylglykol
- Analytical purity: 98 %
- Impurities (identity and concentrations): up to 0.2% Diethylenglycole-monobutylether, 0.1% Diethylenglycole, 0.1% Diethylenglycole-monohexylether
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): Municipal activated sludge taken from a laboratory wastewater treatment plant fed with municipal sewage
- Duration of test (contact time):
- 8 d
Initial test substance concentration
- Initial conc.:
- 20 mg/L
- Based on:
- DOC
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- DOC removal
- Details on study design:
- TEST SYSTEM
- Culturing apparatus:
- Number of culture flasks/concentration: 6
CONTROL AND BLANK SYSTEM
- Inoculum blank: 3
- Abiotic sterile control: 3
- Toxicity control: 3
- reference substance: 3
Concentration of test substance: 32 mg/l = 20 mg/l DOC
Water: 500 ml
Nutrient solution: 6 ml
Inoculum: 0.5 ml
33.9 ml stock solution
Additional water: 427.3 - 493.5 ml
Total volume: 1000 ml
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradation
- Parameter:
- % degradation (DOC removal)
- Value:
- 86
- Sampling time:
- 8 d
- Details on results:
- Kinetic of test substance (in %):
= 3.3 after 1 day
= 85.4 after 5 days
BOD5 / COD results
- Results with reference substance:
- PC control: 12 % DOC after 8 days
Reference control: 99 % after 5 days
Applicant's summary and conclusion
- Interpretation of results:
- readily biodegradable
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
