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EC number: 203-517-1 | CAS number: 107-74-4
- 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:
- 21.03.1997 - 25.04.1997
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 997
- Report date:
- 1997
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Qualifier:
- according to guideline
- Guideline:
- ISO DIS 9408 (Ultimate Aerobic Biodegradability - Method by Determining the Oxygen Demand in a Closed Respirometer)
- GLP compliance:
- yes
- Remarks:
- BASF AG, Ökologie und Umweltanalytik, Labor für Mikrobiologie, 67056 Ludwigshafen (Germany)
Test material
- Reference substance name:
- 3,7-dimethyloctane-1,7-diol
- EC Number:
- 203-517-1
- EC Name:
- 3,7-dimethyloctane-1,7-diol
- Cas Number:
- 107-74-4
- Molecular formula:
- C10H22O2
- IUPAC Name:
- 3,7-dimethyloctane-1,7-diol
- Test material form:
- liquid
Constituent 1
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): BASF laboratory stp
- Laboratory culture: yes
- Method of cultivation:
- Storage conditions:
- Storage length:
- Preparation of inoculum for exposure:
- Pretreatment:
- Concentration of sludge: 30 mg/L dry matter
- Duration of test (contact time):
- 35 d
Initial test substance concentration
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Composition of medium: acc. to guideline
- Additional substrate: no
- Solubilising agent (type and concentration if used): no
- Test temperature: room temperature (not further specified)
- pH: initial: 7.3-7.4; at test end: 7.5-9.0
- pH adjusted: no
TEST SYSTEM
- Culturing apparatus: Sapromat
- Number of culture flasks/concentration: 7
- Method used to create aerobic conditions: not reported
- Measuring equipment: Sapromat
- Test performed in closed vessels: yes
SAMPLING
- Sampling frequency: continuosly during the test
- Sample storage before analysis: no
CONTROL AND BLANK SYSTEM
- Inoculum blank: performed
- Abiotic sterile control: performed
- Toxicity control: performed
- other: the biodegradation of the procedural control (aniline) was measured
Reference substance
- Reference substance:
- aniline
Results and discussion
% Degradationopen allclose all
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 70 - 80
- Sampling time:
- 28 d
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 80 - 90
- Sampling time:
- 35 d
BOD5 / COD results
BOD5 / COD
- Parameter:
- ThOD
- Value:
- 2 609 mg O2/g test mat.
- Results with reference substance:
- Aniline was biodegraded by 70-80% within 14 d.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The test item proved to be readily biodegradable and fulfilling the 10-d-window criterion (70 -80% biodegradation after 28 d and 80 -90% biodegradation after 35 d of incubation at a test substance concentration of 100 mg/L). The test duration was prolonged to 35 d as the biodegradation did not reach a plateau after 28 d. The functional control reached the pass level > 60% after 14 d. In the toxicity control containing both test and reference item 78% biodegradation based on oxygen consumption occurred within 14 d thus indicating that the test item was not inhibitory at the concentration tested.
- Executive summary:
The ready biodegradation of the hydroxyciol (hydroxycitronellol) was investigated in a study conducted according to OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test) and ISO DIS 9408 (Ultimate Aerobic Biodegradability-Method by Determining the Oxygen Demand in a Closed Respirometer) over a period of 28/35 days and using activated sludge as inoculum collected from a laboratory sewage treatment plant which is fed with municipal and synthetic wastewater. The biodegradation rate was determined by measurement of oxygen consumption. Inoculum blank, procedural/functional control with the reference substance aniline, and toxicity control were performed.
This study is regarded as reliable without restrictions and satisfies the guideline requirements for ready biodegradation.
The test item proved to be readily biodegradable and fulfilling the 10-d-window criterion (70 -80% biodegradation after 28 d and 80 -90% biodegradation after 35 d of incubation at a test substance concentration of 100 mg/L). The test duration was prolonged to 35 d as the biodegradation did not reach a plateau after 28 d. The functional control reached the pass level > 60% after 14 d. In the toxicity control containing both test and reference item 78% biodegradation based on oxygen consumption occurred within 14 d thus indicating that the test item was not inhibitory at the concentration tested.
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