Registration Dossier
Registration Dossier
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EC number: 609-869-6 | CAS number: 40834-42-2
Biodegradation in water: screening tests
Administrative data
- 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: GLP-guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 001
- Report date:
- 2001
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)
- GLP compliance:
- yes
Test material
- Reference substance name:
- 5-hydroxy-4-methyl-2,5-dihydrofuran-2-one
- EC Number:
- 609-869-6
- Cas Number:
- 40834-42-2
- Molecular formula:
- C5 H6 O3
- IUPAC Name:
- 5-hydroxy-4-methyl-2,5-dihydrofuran-2-one
- Details on test material:
- - Name of test material (as cited in study report): Hydroxybutenolid
- Molecular weight (if other than submission substance): C5H6O3
- Physical state: solid
- Analytical purity: 92.7 %
- Impurities (identity and concentrations): 0.12 % water
- Purity test date:
- Product No.: 068039
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic (adaptation not specified)
- Details on inoculum:
- Inoculum:
Activated sludge from laboratory wastéwater plants treating municipal sewage . Concentration of dry substance
30 mg/I . - Duration of test (contact time):
- 21 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
Reference substance
- Reference substance:
- aniline
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (DOC removal)
- Value:
- 0 - 10
- Sampling time:
- 3 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 20
- Sampling time:
- 4 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 90 - 100
- Sampling time:
- 5 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 100
- Sampling time:
- 21 d
Applicant's summary and conclusion
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.
