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EC number: 430-910-7 | CAS number: 13335-71-2
- 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
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Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 02 Jun - 24 Jun, 1999
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: done under OECD method and GLP
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 999
- Report date:
- 1999
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- ISO DP 6060 (Water Quality - Determination of the Chemical Oxygen Demand)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- GLP compliance:
- yes
- Remarks:
- OECD
Test material
- Reference substance name:
- -
- EC Number:
- 430-910-7
- EC Name:
- -
- Cas Number:
- 13335-71-2
- Molecular formula:
- Hill formula: C10H12O3 CAS formula: C10H12O3
- IUPAC Name:
- 2-(2,6-dimethylphenoxy)acetic acid
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- Effluent from a strongly aerated laboratory activated sludge plant was kept under aerobic conditions. To prepare the inoculum, the sample was filtered through a course filter and the first 200ml discarded.
- Duration of test (contact time):
- 28 d
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- Inhibition effects, if any, were checked by testing together the test article (2mg/L) and the reference substance, sodium acetate (2mg/L)
Test solns were incubated in the dark at 20±1°C and analysed for dissolved oxygen at 7, 14, 21 and 28 days.
Reference substance
- Reference substance:
- other: sodium acetate
Results and discussion
- Preliminary study:
- A-172245.0 may not be termed as readily biodegadeable.
There was no evidence of inhibitory effects on the bacteria inoculum at 2mg/L.
% Degradationopen allclose all
- Parameter:
- % degradation (O2 consumption)
- Value:
- 0
- Sampling time:
- 7 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 0
- Sampling time:
- 14 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 0
- Sampling time:
- 21 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 2.47
- Sampling time:
- 28 d
- Details on results:
- Since the biodegradation in the 2 series of bottles containing 2mg/L sodium acetate + 2mg/L A-172245.0 on day 14 was 81.4% (i.e. greater than 25% of the ThOD), it can be assumed that the test article has no significant inhibitory effect on the bacteria inoculum.
Since the biodegadability of the test article did not exceed the pass level of 60%, determinations for nitrites and nitrates were not performed.
BOD5 / COD results
- Results with reference substance:
- Sodium acetate attained 69.87%, 84.62%, 94.23% and 98.08% biodegredation after 7, 14, 21 and 28 days respectively.
Any other information on results incl. tables
COD: 2.025 O2/mg (average value)
ThOD NH3 (without nitrification): 2.042 O2/mg
ThOD of the reference substance: 0.780 O2/mg
BOD on days 7,14, 21 and 28 were 0, 0, 0 and 0.05 mg O2/mg
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- other: not readily biodegradable
- Conclusions:
- COD: 2.025 O2/mg (average value)
ThOD NH3 (without nitrification): 2.042 O2/mg
ThOD of the reference substance: 0.780 O2/mg
BOD on days 7,14, 21 and 28 were 0, 0, 0 and 0.05 mg O2/mg - Executive summary:
A-172245.0 may not be termed as readily biodegadeable.
There was no evidence of inhibitory effects on the bacteria inoculum at 2mg/L.
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.
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