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EC number: 206-376-4 | CAS number: 334-48-5
- 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:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Deviations:
- yes
- Remarks:
- oxygen concentration in test bottles below 0.5 mg/L at test end
- GLP compliance:
- no
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): sewage treatment plant Hochdahl, Germany
- Initial cell/biomass concentration: 10 E+03 to 10 E+04 cells/mL
- Water filtered: yes
- Type and size of filter used, if any:through a corase paper filter, the first 200 mL were discarded - Duration of test (contact time):
- 30 d
- Initial conc.:
- 2 mg/L
- Based on:
- test mat.
- Initial conc.:
- 5 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Composition of medium: deionised water was used for the test which is not in line with the guideline.
- Solubilising agent (type and concentration if used): Sodium hydroxide
- Test temperature: 19.9 - 20.1 °C
- pH: 7 - 8
- Aeration of dilution water: aerated until O2 saturation was 8-9 mg O2/L
TEST SYSTEM
- Culturing apparatus: completely filled closed bottles
- Number of culture flasks/concentration: 2
SAMPLING
- Sampling frequency: after 5, 15 and 30 days, which is not in line with the guideline
CONTROL AND BLANK SYSTEM
- Inoculum blank: 4 - Reference substance:
- other: Dodecylsulfate
- Parameter:
- % degradation (O2 consumption)
- Value:
- 105
- Sampling time:
- 30 d
- Remarks on result:
- other: 2 mg/L
- Parameter:
- % degradation (O2 consumption)
- Value:
- > 72
- Sampling time:
- 30 d
- Remarks on result:
- other: 5 mg/L
- Details on results:
- > 72 % of the test substance was degraded whithin 30 days at a concentration of 5 mg/L. 60% were reached within the given 10 day window as required. Thus, the test substance can be regarded as readily biodegradable.
- Parameter:
- COD
- Value:
- 2.51 mg O2/g test mat.
- Results with reference substance:
- The reference substance is readily biodegradable since 90 % was degraded after 30 days and over 60 % in the 10 day window. The ThOD of the reference substance was 2.02 mg O2/ mg dodecylsulfate
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study with acceptable restricitons
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Deviations:
- yes
- Remarks:
- oxygen concentration was < 0.5 mg/L in test bottles
- GLP compliance:
- no
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): sewag treatment plant Hochdahl, Germany
- Initial cell/biomass concentration: 10 E+03 - 10 E+05
- Water filtered: yes
- Type and size of filter used, if any: coarse paper filter - Duration of test (contact time):
- 30 d
- Initial conc.:
- 2 mg/L
- Based on:
- test mat.
- Initial conc.:
- 5 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Composition of medium: test substance with dilution water and solubility agent
- Solubilising agent (type and concentration if used): sodium hydroxide
- pH: 7 - 8
- Aeration of dilution water: prior to the application the water was aerated until O2 saturation was 8-9 mg O2/L
- Other: The dilution water was deionised water instead of nutrient medium as claimed by the guideline
TEST SYSTEM
- Culturing apparatus: closed bottles
- Number of culture flasks/concentration: 2
SAMPLING
- Sampling frequency: after 0, 5, 15 and 30 d. This is not in line with the guideline, since sampling is supposed to be every 3 - 4 days for the assessment of the 10 day window
CONTROL AND BLANK SYSTEM
- Inoculum blank: 4 duplications
- Toxicity control: 2 duplications
- Other: inoculated medium with emulsifier: 4 - Reference substance:
- other: dodecylsulfate
- Parameter:
- % degradation (O2 consumption)
- Value:
- 86
- Sampling time:
- 30 d
- Remarks on result:
- other: 2 mg/L
- Parameter:
- % degradation (O2 consumption)
- Value:
- 62
- Sampling time:
- 30 d
- Remarks on result:
- other: 5 mg/L
- Details on results:
- Within the 10-day time window the 60% level was passed. After 30 days the degradation was at 86% for 2 mg a.s./L and at 62% for 5 mg a.s./L. Thus, the test substance is regarded readily biodegradable.
- Parameter:
- COD
- Value:
- 2.88 mg O2/g test mat.
- Results with reference substance:
- Dodecylsulfate also passed the 60 % level within 10 days. After 30 days the degradation was 89% and the ThOD was 2.02 O2/ mg reference substance.
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- Please refer to the category justification provided in IUCLID section 13.
- Parameter:
- % degradation (O2 consumption)
- Value:
- 86
- Sampling time:
- 30 d
- Remarks on result:
- other: 2 mg/L
- Remarks:
- Source: CAS 143-07-7
- Parameter:
- % degradation (O2 consumption)
- Value:
- 62
- Sampling time:
- 30 d
- Remarks on result:
- other: 5 mg/L
- Remarks:
- Source: CAS 143-07-7
- Parameter:
- % degradation (O2 consumption)
- Value:
- 105
- Sampling time:
- 30 d
- Remarks on result:
- other: 2 mg/L
- Remarks:
- Source: 124-07-2
- Parameter:
- % degradation (O2 consumption)
- Value:
- > 72
- Sampling time:
- 30 d
- Remarks on result:
- other: 5 mg/L
- Remarks:
- Source: 124-07-2
- Parameter:
- COD
- Value:
- 2.88 mg O2/g test mat.
- Remarks on result:
- other: Source: 143-07-7
- Parameter:
- COD
- Value:
- 2.51 mg O2/g test mat.
- Remarks on result:
- other: Source: 124-07-2
Referenceopen allclose all
Description of key information
Biodegradation: readily biodegradable: 62 – 105 % after 30 d (O2 consumption, OECD 301 D)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
No study on the biodegradation of decanoic acid in water is available. Therefore, read across from the key studies of a shorter (octanoic acid, C8) and a longer-chain fatty acid (lauric acid, C12), which are members of the fatty acid category, was conducted.
The study with octanoic acid (2004) was performed according to OECD 301D (non-GLP) where the substance was tested at concentrations of 2 and 5 mg/L for 30 days. At a test substance concentration of 5 mg/L more than 72% was degraded within 30 days. Due to the good biodegradability at 5 mg/L, the oxygen concentration remained inadequate so that the 72% degradation should be regarded as a minimum value. At a test concentration of 2 mg/L octanoic acid was completely degraded. 60% degradation was reached within the 10 day window as required. Thus, octanoic acid can be regarded as readily biodegradable.
The read across from lauric acid (C12) to decanoic acid (C10) is based on the key study of lauric acid (2001). The test was performed in a closed bottle test according to OECD 301D. After 30 days 86% oxygen consumption at a substance concentration of 2 mg/L and 62% at 5 mg/L were observed. The 10-day window criterion was met.
Based on the ready biodegradability of the category members octanoic and lauric acid, decanoic acid can be regarded as readily biodegradable, too. This assumption is consistent with the hazard assessment presented in the OECD SIDS (2009) for the category “Aliphatic Acids Category” where aliphatic fatty acids with a carbon chain length in the range of C8 – C22 were judged to be readily biodegradable.
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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