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EC number: 260-612-0 | CAS number: 57195-28-5
- 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
- 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
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Dipotassium dodecenylsuccinate
- EC Number:
- 260-612-0
- EC Name:
- Dipotassium dodecenylsuccinate
- Cas Number:
- 57195-28-5
- Molecular formula:
- C16H26K2O4*H2O
- IUPAC Name:
- Dipotassium dodecenylsuccinate
- Test material form:
- liquid
- Details on test material:
- 30 % aqueous solution
pure substance is solid (bulk/powder), but is only used as aqueous solution and blends it into mixture
Substance dissolves in water at 40wt%, then becomes gel and becomes solid, if mixed 61wt% with water
Constituent 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Expiration date: 2019-07-27
- Purity test date: Active Ingredient 30%; Water 70%
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Store in a dark, dry place at room temperature.
- Solubility and stability of the test substance in the solvent/vehicle: in water
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): Municipal sewage treatment plant, 31137 Hildesheim, Germany. Activated sludge from the sewage plant at Hildesheim is suited as it receives predominantly municipal sewage and hardly any industrial chemical waste. Receipt: 2017-12-12.
- Preparation of inoculum for exposure:
- Pretreatment: The activated sludge was washed twice with chlorine free tap water. After the second washing the settled sludge was resuspended in mineral salts medium and was maintained in an aerobic condition by aeration for 2 hours. Thereafter the sludge was homogenized with a blender. After sedimentation the supernatant was decanted and maintained in an aerobic condition by aeration with CO2-free air for 7 days. 15 mL/L were used to initiate inoculation.
- Concentration of sludge:
- Initial cell/biomass concentration: Approx. 10 e7 - 10 e8 CFU/L
- Water filtered: yes - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 92 mg/L
- Based on:
- test mat.
- Remarks:
- corresponding to a ThOD of 50.6 mg O2/L per test vessel.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Composition of medium: Mineral salts medium according to OECD 301 F
- Test temperature: 20 - 24, ± 1 °C
- pH: 7.69 - 7.76
- pH adjusted: yes
- Continuous darkness: yes
TEST SYSTEM
- Measuring equipment: OxiTop OC110 controller with software Achat OC, WTW; OxiTop measuring heads, WTW; Stirring platform, WTW; Climatic exposure test cabinet, RUMED RUBARTH APPARATE GMBH; pH-Meter, Multi 350i, WTW; Datalogger 174 T, TESTO; Analytical balance, SARTORIUS; Balance, KERN; Magnetic stirrer, MS3000, lab 4 you; Multipette X-Stream, EPPENDORF
CONTROL AND BLANK SYSTEM
- Functional control: sodium benzoate
- Inoculum blank: Test medium without test and / or reference item
- Toxicity control: test and reference item
Results and discussion
% Degradation
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 2
- Sampling time:
- 28 d
BOD5 / COD results
BOD5 / COD
- Key result
- Parameter:
- ThOD
- Value:
- 0.55 mg O2/g test mat.
Any other information on results incl. tables
The pass level for ready biodegradation (≥ 60% degradation) was reached within 3 days. The validity criterion that the degradation should be ≥ 60% after 14 d was fulfilled.
Stages of Biodegradation: The adaptation phase changed to degradation phase within 2 days (degradation > 10%), with a maximum of 84% on day 26.
In the toxicity control the biodegradation achieved 47% after 14 days, with 52% after 28 days. The validity criterion that the test item should not inhibit the biodegradation of the reference item was fulfilled.
Both test item replicates did not reachthe 10% level (beginning of biodegradation) within the 28-day-period of the study. The mean biodegradation on day 28 was 2%.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- Both test item replicates did not reach the 10% level (beginning of biodegradation) within the 28-day-period of the study. The mean biodegradation on day 28 was 2%.
After a test period of 28 days, the test item is classified as not readily biodegradable within the 28 day period of the study.
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