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Diss Factsheets
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EC number: 248-570-1 | CAS number: 27610-92-0
- 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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on study design:
- INOCULUM/TEST ORGANISM
- Type of sludge: activated sludge
- Source: domestic waste water treatment plant
- Sampling site: sewage plant Groß-Zimmern, Germany
- Feeding: not applicable
- Method of cultivation: not applicable
- Preparation of inoculum: The activated sludge was washed by centrifugation and the supernatant liquid phase was decanted. The solid phase was resuspended in tap water and again centrifuged. This procedure was repeated twice
- Pretreatment: aeration with CO2-free air overnight
- Initial cell concentration: not measured
TEST SYSTEM
- Culturing apparatus: 5 l glas amber test flasks
- Number of culture flasks per concentration: 2
- Aeration device: CO2-free air production by leading air through 2 bottles, each containing about 500 ml NaOH (25% in water) to trap CO2. The CO2-free air was sparged through the scrubbing solutions at a rate corresponding to about 30-100 ml/min
- Measuring equipment: Absorption of the CO2 produced in the reactors in two bottles in series containing 200 ml 0.05 mol/l NaOH. CO2 determination by titration with 0.01M HCl using phenolphthalein as indicator
- Closed vessels used: not applicable
INITIAL TEST SUBSTANCE CONCENTRATION: 20.1 mg/l (14.5 and 14.4 mg DOC/l or TOC/l)
METHOD OF PREPARATION OF TEST SOLUTION: test substance was added directly into the test medium
DURATION OF THE TEST: 28 days
ANALYTICAL PARAMETER: mg of carbon dioxide trapped in sodium hydroxide solution
SAMPLING: on days 1, 4, 6, 8, 11, 14, 18, 21, 25, 28 and on day 29 after acidification
TEST CONDITIONS
- Composition of medium: according to OECD guideline 301
- Additional substrate: none
- Test temperature: 20 – 22 °C
- pH value: 7.6-8.0
- Aeration of dilution water: yes, aeration rate approx. 30-100 ml/minute
- Concentration of suspended solids: 30 mg/l dry solids
- Other relevant factors: none
INTERMEDIATES / DEGRADATION PRODUCTS: not measured
NITRATE/NITRITE MEASUREMENT: no
CONTROLS: blanks: two bottles with inoculum without test substance; toxicity control: one bottle with inoculum, reference substance and test item; procedure control: one bottle with reference substance and inoculum; abiotic control: one bottle with test substance in aqueous test medium
REFERENCE SUBSTANCE: aniline (25.1 mg/l; 19.4 mg/l TOC/l or DOC/L)) - Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- ca. 69
- Sampling time:
- 28 d
- Results with reference substance:
- The reference item aniline degraded to 87% after 14 days , and to 99% after 28 days, thus confirming the suitability of the used activated sludge inoculum.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The percentage biodegradation exceeded 60% within the 10-day window. The test item can therefore be considered to be readily biodegradable.
- Executive summary:
After 28 days the biodegradation of 2 -Butyl octanoic acid was 69 % in an OECD 301B-test. Also the percentage biodegradation exceeded 60% within the 10-day window. The test item can therefore be considered to be readily biodegradable.
Reference
Description of key information
After 28 days the biodegradation of the target substance 2 -Butyl octanoic acid was 69 % in an OECD 301B-test. Also the percentage biodegradation exceeded 60% within the 10-day window. The test item can therefore be considered to be readily biodegradable.This result is supported by a test of the source substance Reaction mass of n-undecanoic-acid and 2-methyl-decanoic-acid and 2-ethyl-nonanoic-acid and 2-propyl-octanoic-acid and 2-butyl-heptanoic-acid for which it was demonstrated to be readily biodegradable in an OECD 301B-test.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
After 28 days the biodegradation of target substance 2 -Butyl octanoic acid was 69 % in an OECD 301B-test. Also the percentage biodegradation exceeded 60% within the 10-day window. The target substance can therefore be considered to be readily biodegradable.
Also the source substance Reaction mass of n-undecanoic-acid and 2-methyl-decanoic-acid and 2-ethyl-nonanoic-acid and 2-propyl-octanoic-acid and 2-butyl-heptanoic-acid was tested for ready biodegradation according to OECD 301B. The degradation of the source substance was 77.2 % within 28 days after acidification. The biodegradation of the read-across substance reached the criterion for ready biodegradation.
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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