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EC number: 263-196-9 | CAS number: 61791-64-8
- 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:
- 02 February 2007 to 02 March 2007
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 306 (Biodegradability in Seawater)
- Deviations:
- no
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- natural water: marine
- Details on inoculum:
- - Natural seawater was collected from Anglesey Sea Zoo in North Wales on 29 January 2007.
- Temperature at collection: 13.1 °C
- pH at collection: 7.84
- Salinity at collection: 31.9 g/L
- Dissolved oxygen at collection: 100.0%
- After collection, the seawater was course filtered and maintained in the dark.
- Seawater was aged prior to use by gentle aeration at 15 ± 2 °C - Duration of test (contact time):
- 28 d
- Initial conc.:
- >= 1.5 - <= 3.5 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- METHODS
- Test medium: Prepared according to the method detailed in STL Runcorn SOP III.36
- Test material was prepared on the initial day of the study.
- Test vessels: Completely filled sealed glass BOD bottles of nominal 272 mL volume.
- Test conditions: All test bottles contained course filtered, natural seawater as inoculum.
- For each of the sample days, duplicate bottles were prepared for each of the test material concentrations and reference material.
- Three replicates for the control vessel were prepared.
- During the study, all bottles were incubated at 16.5 to 17.5 °C in the dark.
ANALYSIS OF STUDY DATA
- The calculated COD value and dissolved oxygen data recorded at each analysis point (including Day 0 readings) were processed to derive the percentage degradability of the test material.
- Degradation values were calculated using the equation % degradability = [(BOD mgO2/mg test material / COD mgO2/mg) * 100] - Reference substance:
- benzoic acid, sodium salt
- Remarks:
- 2.5 mg/L
- Parameter:
- % degradation (O2 consumption)
- Value:
- 71.1
- Sampling time:
- 28 d
- Remarks on result:
- other: 1.5 mg/L test item
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 70.3
- Sampling time:
- 28 d
- Remarks on result:
- other: 3.5 mg/L test item
- Details on results:
- - Using the COD equation in STL Runcorn SOP III.1, the chemical oxygen demand was calculated as 1.931 mg/mg
- Percentage degardability of the test material and reference substance is given in the summary table (attached).
- Degradation profiles for the test item and reference substance are shown in Figure 1 (attached).
- Results of the dissolved oxygen measurements are shown in Table 1 (attached). - Key result
- Parameter:
- COD
- Value:
- 1.931 other: mg/mg
- Results with reference substance:
- - A degradation figure of 96.5% was obtained after 28 days for the reference material.
- The inoculum was thus demonstrated to be biologically active. - Validity criteria fulfilled:
- not specified
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The test item showed high potential for degradation at concentrations of 1.5 mg/L and 3.5 mg/L in the marine environment.
- Executive summary:
The test item was assessed for rate and extent of biodegradation when exposed to marine microorganisms for 28 days in accordance with OECD 306. The substance showed high potential for degradation at concentrations of 1.5 mg/L and 3.5 mg/L.
Reference
Description of key information
The test item was assessed for rate and extent of biodegradation when exposed to marine microorganisms for 28 days in accordance with OECD 306. The substance showed high potential for degradation at concentrations of 1.5 mg/L and 3.5 mg/L (OECD 306).
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Dissolved oxygen concentration removal of 74% was demonstrated in nutrient fortified seawater with a test item concentration of 3.5 mg/L using the closed bottle method (OECD 306). In line with ECHA Guidance on Information Requirements and Chemical Safety Assessment Chapter R.7b: Endpoint specific guidance (Version 4.0; June 2017), the test substance is therefore considered likely to fulfil the criteria for ready biodegradability.
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.
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