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EC number: 939-518-5 | CAS number: 68439-49-6
- 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:
- 10 May - 07 Jun 2005
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
- GLP compliance:
- no
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): From aeration tank of a municipal waste water treatment plant (ARA Werdhölzli, Zürich), no adapted, not pre-conditioned.
- Pretreatment: Prior the test the sludge was washed twice with tap water.
- Concentration of sludge: 30 mg/L - Duration of test (contact time):
- 28 d
- Initial conc.:
- 20.2 mg/L
- Based on:
- other: TOC
- Remarks:
- mean of two replicates
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- TEST CONDITIONS
- Composition of medium: Aerobic mineral salts medium prepared with deionised water
- Test temperature: 22 +/- 0.5 °C
- Suspended solids concentration: 30 mg/L
- Continuous darkness: yes, Temperature-controlled dark room
TEST SYSTEM
- Culturing apparatus: 2500 mL closed glass bottles, containing a total volume of test solution of 2000 mL
- Number of culture flasks/concentration: 2
- Method used to create aerobic conditions: aeration with CO2-free air, fitted to gas-absorption bottles (containing 125 mL of 0.15 M NaOH)
- Details of trap for CO2 and volatile organics if used: gas-absorption bottles filled with NaOH
SAMPLING
- Sampling frequency: daily
CONTROL AND BLANK SYSTEM
- Inoculum blank: 2 replicates
- Procedure control: 1 replicate
- Abiotic sterile control: no
- Toxicity control: no - Reference substance:
- benzoic acid, sodium salt
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 94
- Sampling time:
- 28 d
- Details on results:
- - lag phase: about 1 day
- pass level reached after about 7 days - Results with reference substance:
- - Positive control (sodium benzoate): 98% degradation after 14 days
- Validity criteria fulfilled:
- yes
- Remarks:
- Please refer to table 1 at "Any other information on results incl. tables"
- Interpretation of results:
- readily biodegradable
Reference
Table1: Valditiy criteria for OECD 301B
Criterion from the guideline |
Outcome |
Validity criterion fulfilled |
Difference of extremes of replicate values of the removal of the test chemical at the plateau, at the end of the test or at the end of the 10-d window, as appropriate, is less than 20%. |
<5% |
yes |
Percentage degradation of the reference compound reached the pass level by day 14 (≥ 60%). |
98% after 14 days. |
yes |
The toxicity control should degrade to at least 35% (based on DOC) or at least 25% (based on ThOD or ThCO2) within 14 d. |
n.a. |
n.a. |
The IC content of the test substance suspension in the mineral medium at the beginning of the test must be less than 5% of the TC. |
<5% |
yes |
The total CO2 evolution in the inoculum blank at the end of the test should not normally exceed 40 mg/L medium. |
6.4 mg IC/L |
yes |
Description of key information
Readily biodegradable: 94% in 28 days (OECD 301B)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
The ready biodegradability of Alcohols, C16-C18 (even numbered), ethoxylated, <2.5 EO was investigated in a non-GLP study according to OECD 301B. Domestic activated sludge was used as inoculum. The substance attained 94 % degradation based on CO2 evolution after 28 days of contact time.
Based on the results of the available study Alcohols, C16-C18 (even numbered), ethoxylated, <2.5 EO is assessed as readily biodegradable according to OECD criteria.
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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