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EC number: 801-829-8 | CAS number: 1247790-47-1
- 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
Hydrolysis
Administrative data
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 6 March to 20 September 2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: According to the OECD Guideline and it is GLP.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 013
- Report date:
- 2013
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 111 (Hydrolysis as a Function of pH)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.7 (Degradation: Abiotic Degradation: Hydrolysis as a Function of pH)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 3,6-dimethylheptan-2-ol
- EC Number:
- 801-829-8
- Cas Number:
- 1247790-47-1
- Molecular formula:
- C9H20O
- IUPAC Name:
- 3,6-dimethylheptan-2-ol
- Details on test material:
- - Physical state: clear colorless liquid
- Storage condition of test material: room temperature in the dark
Constituent 1
Study design
- Analytical monitoring:
- yes
- Details on sampling:
- An aliquot of each sample was diluted by a factor of 5 using acetone.
- Buffers:
- The test system used sterile buffer Solutions at pH's 4, 7 and 9
- Details on test conditions:
- Preparation of the Sample Solutions
Stock solutions were prepared in glass flasks at a nominal concentration of 100 mg/L in the three buffer solutions. A 1% co-solvent of acetone was used to aid dissolution. The stock solutions were split into individual sealed glass vials (with no headspace) for each data point. The sample solutions were shielded from light whilst maintained at the test temperature.
Duration of test
- Duration:
- 120 h
- Temp.:
- 50 °C
- Number of replicates:
- Duplicate standard solutions of test item were prepared in acetone: water (80:20 v/v) at a nominal concentration of 20 mg/L.
Results and discussion
- Preliminary study:
- An initial attempt of the preliminary test indicated a significant decrease in the test item concentration over time at 50ºC; whereas, based on the chemical structure of the test item it was expected to be stable towards hydrolysis at the test temperature and pH. Consequently, it was suspected that the loss of test item was possibly due to volatility issues, and thus, testing was repeated using sealed glass vials but with no headspace above the sample solutions.
- Test performance:
- The pH of the sample solutions remained at the nominal pH±0.2 during testing.
No significant peaks were observed at the approximate retention time of the test item on analysis of any matrix blank solutions.
Any other information on results incl. tables
pH 4 at 50ºC
Time (Hours) | Concentration (g/L) | % of mean initial concentration | ||
A | B | A | B | |
0 | 0.0999 | 0.0974 | - | - |
24 | 0.0972 | 0.0976 | 98.5 | 99.0 |
120 | 0.0958 | 0.0973 | 97.1 | 98.6 |
Result: Less than 10% hydrolysis after 5 days at 50ºC, equivalent to a half-life greater than 1 year at 25ºC
pH 7 at 50ºC
Time (Hours) | Concentration (g/L) | % of mean initial concentration | ||
A | B | A | B | |
0 | 0.0994 | 0.0999 | - | - |
24 | 0.0978 | 0.0963 | 98.1 | 96.6 |
120 | 0.0959 | 0.0961 | 96.1 | 96.4 |
Result: Less than 10% hydrolysis after 5 days at 50ºC, equivalent to a half-life greater than 1 year at 25ºC.
pH 9 at 50ºC
Time (Hours) | Concentration (g/L) | % of mean initial concentration | ||
A | B | A | B | |
0 | 0.0976 | 0.0988 | - | - |
24 | 0.0948 | 0.0950 | 96.6 | 96.7 |
120 | 0.0934 | 0.0948 | 95.1 | 96.5 |
Result: Less than 10% hydrolysis after 5 days at 50ºC, equivalent to a half-life greater than 1 year at 25ºC
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The estimated half-life of the test item at 25ºC for pH 4, 7 and 9 has been shown to be greater than 1 year.
- Executive summary:
Assessment of hydrolytic stability was carried out using a procedure designed to be compatible with Method C7 Abiotic Degradation, Hydrolysis as a Function of pH and Method 111 of the OECD Guideline. The estimated half-life of the test item at 25ºC for pH 4, 7 and 9 has been shown to be greater than 1 year.
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