Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Diss Factsheets
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: 424-970-3 | CAS number: -
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
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:
- 26 May to 23 June 1999
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
- Version / remarks:
- 1992
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Version / remarks:
- 1992
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Specific details on test material used for the study:
- Storage conditions: room temperature
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- A sample of activated sludge was taken from an oxidation ditch situated in the municipality of Berkel and Roodenrijs, The Netherlands. The oxidation ditch was used to treat domestic waste water. The activated sludge was transported in a plastic bottle and aerated until use.
The sludge was used at the same day it was collected.
Settling time of the sludge: 30 minutes
Used supernatant for inoculation: 30.8 mL/ L
Total volume inoculated mineral medium: 26 L
The mineral medium was prepared from concentrated stock solutions in ultrapure water and was aerated vigorously before use. - Duration of test (contact time):
- 28 d
- Initial conc.:
- 1.2 mg/L
- Based on:
- test mat.
- Remarks:
- corresponds to a ThOD of 2.5 mg O2/L
- Initial conc.:
- 2.4 mg/L
- Based on:
- test mat.
- Remarks:
- corresponds to a ThOD of 5.0 mg O2/L
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Test temperature: 19.1 - 20.0
- pH: 6.9 - 7.4
- pH adjusted: no
- Aeration of dilution water: yes
The following test series were included:
- Test substance
Concentrations: 0, 1.20 and 2.40 mg/L
Number of replicate bottles/ time-point: 4
Oxygen concentration determined after: 0, 7, 14, 21, 28 and 56 days
- Microbial activity control
Concentration of the reference substance: 4.0 mg/L
Number of replicate bottles/ time-point: 4
Oxygen concentration determined after: 0, 7 and 14 days
- Toxicity control
Concentration of reference substance: 4.0 mg/L
Concentration of test substance: 2.40 mg/L
Number of replicate bottles/ time-point: 4
Oxygen concentration determined after: 0, 7 and 14 days
The oxygen depletion in each test bottle after 7, 14, 21 and 28 days was calculated by subtracting each measured oxygen concentration from the mean oxygen concentration measured at the start of the test. The oxygen depletion due to the test or control substance at each time was calculated (in mg O2/L) by subtracting the oxygen concentration in the relevant inoculum control or other control bottle from that in the bottle under consideration. These values were then converted to values per mg substance (BOD). The percentage biodegradation of the test substance was calculated as BOD/ThODNH3 x 100. - Reference substance:
- acetic acid, sodium salt
- Parameter:
- % degradation (O2 consumption)
- Remarks:
- 2.4 mg/L
- Value:
- 4
- Sampling time:
- 14 d
- Parameter:
- % degradation (O2 consumption)
- Remarks:
- 1.2 mg/L
- Value:
- 5
- Sampling time:
- 7 d
- Details on results:
- The mean biochemical oxygen demand (BOD) values and the percentage biodegradation calculated from the ThOD of SDBR are given in tabular from below.
The maximum (mean) biodegradability (corrected for the inoculum control) of 5% was reached with 1.20 mg/L after 7 days and 4% with 2.40 mg/L after 14 days. Due to the small difference between the control and the treatment at these low biodegradation values, a considerable variation was observed between individual bottles. - Results with reference substance:
- Degradation (reference substance): 79 % degradation after 7 d and 77 % degradation after 14 d.
The validity criteria were met as follows:
1. The replicate degradation at 1.20 mg/L varied between 2% and 6% degradation after 28 days, and at 2.40 mg/L between 1% and 7% degradation after 28 days. At both concentrations the extreme replicate values differ by less than 20%.
2. The reference substance was degraded for 79% (ThODNH3) within 14 days.
3. No inhibition was observed in the toxicity control with the high test substance concentration.
4. With 2.99 mg O2/L, the inoculum control oxygen consumption was higher than the validity limit after 28 days. However the inoculum activity is not considered to have influenced the result of the test.
5. The residual oxygen concentration in the test bottles was >>0.5 mg O2/L at any time.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- In a reliable biodegradation study, performed according to OECD/EC guidelines and GLP, SDBR was considered not to have exceeded the pass level of 60% ThOD removal within 28 days, classifying it as not readily degradable.
Reference
SDBR at 1.20 mg/L
Time (days) | BOD (mg O2/mg) | % biodegradation ThODNH3 |
7 | 0.1 | 5 |
14 | 0.07 | 4 |
21 | 0.05 | 2 |
28 | 0.01 | 0 |
SDBR at 2.40 mg/L
Time (days) | BOD (mg O2/mg) | % biodegradation ThODNH3 |
7 | -0.04 | -2 |
14 | 0.08 | 4 |
21 | 0.04 | 2 |
28 | 0.03 | 2 |
Description of key information
Based on the results of a reliable biodegradation study, performed according to OECD/EC guidelines and GLP, SDBR was considered to be not readily degradable.
Key value for chemical safety assessment
- Biodegradation in water:
- not biodegradable
- Type of water:
- freshwater
Additional information
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.