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EC number: 250-280-5 | CAS number: 30673-36-0
- 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
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 20. Jul - 15 Sep. 2018
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Version / remarks:
- prolonged testing period (56 days)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Date of certificate: 17.08.2016 (The Department of Health of the Government of the United Kingdom)
Test material
- Reference substance name:
- Butyl decanoate
- EC Number:
- 250-280-5
- EC Name:
- Butyl decanoate
- Cas Number:
- 30673-36-0
- Molecular formula:
- C14H28O2
- IUPAC Name:
- butyl decanoate
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- natural water: freshwater
- Details on inoculum:
- - Source of inoculum/activated sludge: Surface water was collected from Malmesbury Pond, Sandymoor, UK on 14th July 2018.
- Pretreatment: filtered and aerated at 22 ± 2°C prior to use
- Initial cell/biomass concentration: 100 ml/L test media - Duration of test (contact time):
- 28 - 56 d
Initial test substance concentration
- Initial conc.:
- 15.5 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- TEST CONDITIONS
- Composition of medium: 3 L test medium, the test material was added directly to the test vessels.
- Test temperature: 22 ± 2°C
- Continuous darkness: yes
TEST SYSTEM
- Culturing apparatus: 3 Litre volumes of test media were stirred constantly in round, flat bottomed flasks
- Number of culture flasks/concentration: 2
- Method used to create aerobic conditions: Carbon dioxide free air was passed through the test solutions at an estimated rate of 30 to 100 ml per minute.
- Measuring equipment: Titres were taken for the barium hydroxide at the start and end of each time period.
- Details of trap for CO2 and volatile organics if used: barium hydroxide
SAMPLING
- Sampling frequency: days 1, 3, 7, 10, 14, 17, 21 , 28, 35, 42, 49, 56 and 57.
CONTROL AND BLANK SYSTEM
- Inoculum blank: no
- Abiotic sterile control: no
- Inoculum control: 2 control vessels (containing inoculum but no test or reference material)
- Reference control: 1 vessel (containing 102.9 mg (20 mg C l-1) of the reference material, sodium benzoate in 3 litres of test media)
- Toxicity control: 1 Inhibition Control (contained sodium benzoate at 34.3 mg/L and test material at 15.5 mg/L in 3 litres of test media)
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 47.95
- Sampling time:
- 28 d
- Remarks on result:
- other: mean of two replicates
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 59.05
- Sampling time:
- 56 d
- Remarks on result:
- other: mean of two replicates
- Details on results:
- A degradation figure of 35.8% after 14 days (based on total combined DOC) was obtained for the inhibition control. The Inhibition Control contained sodium benzoate at 34. 3 mg/L and test material at 15.5 mg/L in 3 litres of test media.
BOD5 / COD results
- Results with reference substance:
- Sodium Benzoate: 64.4% after 28 d based on CO2 evolution
Any other information on results incl. tables
Table 1: Degradation rates based on CO2 evolution of test substance, reference substance and inhibition control
Cumulative degradation (%) |
||||
Day of Titration |
Sodium Benzoate (34.3 mg l-1) |
BUTYL DECANOATE (15.5 mg l-1A) |
BUTYL DECANOATE (15.5 mg l-1B) |
Inhibition Control |
1 |
1.2 |
* |
* |
6.4 |
3 |
28.5 |
* |
* |
17.7 |
7 |
47.2 |
7.9 |
6.3 |
33.6 |
10 |
58.6 |
13.6 |
18.4 |
37.6 |
14 |
64.5 |
30.3 |
36.1 |
35.8 |
17 |
62.7 |
34.3 |
27.7 |
39.7 |
21 |
63.7 |
38.9 |
47.6 |
54.5 |
28 |
64.4 |
45.7 |
50.2 |
69.1 |
35 |
62.8 |
44.5 |
57.5 |
68.5 |
42 |
54.3 |
42.5 |
56.7 |
81.6 |
49 |
53.4 |
45.5 |
62.3 |
90.4 |
56 |
54.7 |
55.5 |
64.6 |
96.0 |
57 |
55.1 |
55.1 |
63.0 |
99.3 |
*Indicates negative degradation
Table 2: Validity criteria for OECD 301.
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%. |
9% (day 28) 12.7% (day 56) |
yes |
Percentage degradation of the reference compound reached the pass level by day 14 (≥ 60%). |
64.5% |
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. |
35.8% |
yes |
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Remarks:
- see Table 2 at "Any other information on results incl. tables"
- Interpretation of results:
- not readily biodegradable
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