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EC number: 205-265-8 | CAS number: 136-85-6
- 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:
- From April 12th 2018 to June 20th 2018.
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Version / remarks:
- according to EU method C.4-C
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- The certificate is included in the Study Report attached.
- Specific details on test material used for the study:
- Batch number: N6A3I
Expiry date: 04 August 2022 - Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic (adaptation not specified)
- Remarks:
- Activated sludge from a biologic sewage treatment plant was used as inoculum. the chosen plant treats mostly domestic sewage.
- Details on inoculum:
- - Source of inoculum/activated sludge: The sludge was taken from the activation basin of the sewage treatment plant, In den Seewiesen, 67480 Edenkoben, Germany. Date of collection: 18 May 2018, batch n°: 20180518.
- Pretreatment: The sludge was filtrated, washed with test medium (2X) and re-suspended in test medium. It was then aerated until use. The dry matter was determined to contain 4520 mg of suspended solids.
- Concentration of sludge: 25.0 mg/L - Duration of test (contact time):
- 28 d
- Initial conc.:
- ca. 30 mg/L
- Based on:
- test mat.
- Initial conc.:
- ca. 20 mg/L
- Based on:
- TOC
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Remarks:
- Analyses of the emitted CO2 were made by IC measurement using the carbon analyser TOC multi N/C 2100S, Analytik Jena. Each sample was measured in duplicate or triplicate, respectively (depending of the variation between the measured values).
- Details on study design:
- TEST CONDITIONS
- Composition of medium:
10 mL of Solution A (8.5 g of Potassium dihydrogen phosphate + 21.75 g of Dipotassium hydrogen phosphate + 33.4 g of Disodiumhydrogen phosphate dihydrate + 0.5 g of Ammonium chloride in 1000 mL H2O demin.)
1 mL of Solution B (27.5 g of Calcium chloride in 1000mL H2O demin.)
1 mL of Solution C (22.5 g of Magnesium sulphate heptahydrate in 1000mL H2O demin.)
1 mL of Solution D (0.25 g of Iron (III) chloride hexahydrate + 0.4 g of Di-sodium-ethylene diaminetetraacetate dihydrate in 1000mL H2O demin.)
in 1000mL H2O demin.
- Test temperature: 20.4 - 23.0 °C
- pH: 7.6-7.7
- pH adjusted: no
TEST SYSTEM
- Culturing apparatus: The test vessels were aerated with purified (by activated charcoal), CO2-scrubbed, moistened air. The scrubbing of carbon dioxide was achieved by bubbling the purified air through a flask containing 1.5 M NaOH. To control the absence of CO2, the air was then led througha flask containing a solution of Ba(OH)2 before reaching the test vessels.
- Number of culture flasks/concentration: 2 flasks of 1500 mL (30 mg/L of the test substance)
- Measuring equipment: IC measurement using the carbon analyser TOC multi N/C 2100S, Analytik Jena.
- Details of trap for CO2 and volatile organics if used: The emitted CO2 was trapped in 0.25 M NaOH. Two scrubbers containing 100 mL each were connected in series to the test vessels. The initial IC value of the 0.25M NaOH was separately determined in each flask.
SAMPLING
- Sampling frequency: 9 samples were taken on day 0, 2, 6, 8, 10, 14, 17, 23 and 29.
- Sampling method: The sample volume was 1 mL; The resulting chane in the volume of the front flask was considered in the calculation of emitted CO2.. On day 28, 5 mL HCl 2M was added to each test flask in order to drive off dissolved CO2. On day 29, samples were from both scrubber flasks were taken.
CONTROL AND BLANK SYSTEM
- Blank controls: 2 flasks of 1500 mL containing mineral medium and inoculum
- Positive control flasks: 2 flasks of 1500 mL containing Aniline, mineral medium and inoculum
- Abiotic control: 1 flask of 1500 mL containing test item, mineral medium and HgCl2
- Toxicity control: 1 flask of 1500 mL containing test item, Aniline, mineral medium and inoculum.
- Reference substance:
- aniline
- Key result
- Parameter:
- % degradation (inorg. C analysis)
- Value:
- >= 86.9 - <= 88.8
- Sampling time:
- 29 d
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Remarks:
- The test item 5-methyl-1H-benzotriazole is considered as "readily biodegradable". The degree of biodegradation reached 87% after 28 days. The 10-day-window began on day 9 at its end, 82% degradation were reached surpassing the pass level of 60% given in the OECD guideline. Abiotic degradation was not observed.
Reference
Description of key information
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
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.
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