Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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: 203-776-0 | CAS number: 110-53-2
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 995
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
- Deviations:
- not specified
- GLP compliance:
- not specified
Test material
- Reference substance name:
- 1-bromopentane
- EC Number:
- 203-776-0
- EC Name:
- 1-bromopentane
- Cas Number:
- 110-53-2
- Molecular formula:
- C5H11Br
- IUPAC Name:
- 1-bromopentane
- Details on test material:
- No details
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- not specified
- Duration of test (contact time):
- 28 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 4.1 mg/L
- Based on:
- test mat.
- Initial conc.:
- 2.05 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- Two flasks for each test.
Analyses done at 0, 7, 14, 21 and 28 days.
Reference substance
- Reference substance:
- benzoic acid, sodium salt
- Remarks:
- At 2 and 4 mg/l
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- 1.4
- Sampling time:
- 28 d
BOD5 / COD results
BOD5 / COD
- Parameter:
- BOD5
- Value:
- 0.02 g O2/g test mat.
- Results with reference substance:
- Biodegradation after 28 days: 77.5 %
BOD = 1.3 g O2/g
Any other information on results incl. tables
Validity criteria
- O2 consumption in control test < 1.5 mg/l at 28 days
- residual concentration od test material > 0.5 mg:/l
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- With a biodegradabilty of 1.4 % after 28 days, Bromo-1-pentane is determined as no biodegradable.
- Executive summary:
The biodegradability study of Bromo-1 -pentane gives a maximum biodegradation level of 1.4 % in 28 days.
The 10-day window can't be determined.
The validity criteria of the method were respected.According to these criteria the test item cannot be considerd as ready 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.
