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Diss Factsheets
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EC number: 950-576-0 | CAS number: -
- 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
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 17 june 2019 - 04 July 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- 1998
- Deviations:
- no
- Principles of method if other than guideline:
- No freezing point could be determined by DSC. Therefore an additional experiment was performed in which the consistency of the substance was determined by visual observation after samples had been placed at approx. -20°C and -80°C. The additional experiment is not a guideline study but was described in sufficient detail in the study report.
- GLP compliance:
- yes
- Type of method:
- other: differential scanning calorimetry and storage in freezer
- Key result
- Melting / freezing pt.:
- < -83.3 °C
- Conclusions:
- The substance has no melting/freezing point at temperatures down to -83.3°C.
- Executive summary:
Differential Scanning Calorimetry was performed to determine the melting and boiling temperature. The experiments were based on EC A.1, OECD 102 and OPPTS 830.7200 (melting temperature) and on EC A.2, OECD TG 103 and OPPTS 830.722 (boiling temperature). GLP-study. There was no DSC effect due to melting/freezing of the liquid substance between 25°C and -90°C. The boiling temperature was determined to be 245.8°C at 1014 hPa (mean of duplicate experiments). An additional non-guideline experiment 'Storage in freezer' was performed. Additional samples were placed at -20.8 ± 1.7°C and -83.3 ± 1.9°C for 41 hours, both resulting in liquid forms. From this it was concluded that the substance has no melting/freezing point at temperatures down to -83.3°C.
Reference
TGA EXPERIMENT (PRELIMINARY TEST)
Decrease of weight from 150°C upwards: 25% at 221°C and 70% at 245°C.
After the experiment it was observed that the test item was evaporated from the sample container.
DSC EXPERIMENT 1
During cooling, no effects were observed. During heating an endothermic effect was observed between 150°C and 275°C. The extrapolated onset temperature of the effect was 240.331°C. The endothermic effect was most likely obtained due to boiling of the test item because after the experiment it was observed that the test item had evaporated from the sample container.
DSC EXPERIMENT 2
In order to investigate the endothermic effect, a higher heating rate of 50°C/minute was used in the Experiment 2. The extrapolated onset temperature was 247.685°C. The endothermic effect had not shifted to higher temperatures. It demonstrated that boiling of the test item caused the endothermic effect. After the experiment it was observed that the test item had evaporated from the sample container. Since a higher heating rate was used, the extrapolated onset temperature was not used in the calculation of the boiling point.
DSC EXPERIMENT 3
Experiment 3 was performed with the same heating rate as in Experiment 1. Similar results as in Experiment 1 were obtained. The extrapolated onset of the boiling effect was 245.935°C. The difference in the extrapolated onset between Experiment 1 and 3 was > 1°C. After the experiment it was observed that the test item had evaporated from the sample container. Since in experiment 2 and 3 no cooling cycle was applied, the test item might have been evaporated during the heating cycle. Therefore, another experiment was performed with the same conditions as experiment 3.
DSC EXPERIMENT 4
Experiment 4 was performed as a duplicate of Experiment 3. Heating rate was the same as in Experiment 1 and Experiment 3. The extrapolated onset of the boiling peak was 245.714°C. After the experiment it was observed that the test item had evaporated from the sample container.
DSC curves: see Illustration below.
STORAGE IN FREEZER
After storage in a freezer (-20.8 ± 1.7°C) for 41 hours, the test item was observed to be a liquid.
After storage in freezer (-83.3 ± 1.9°C) for 41 hours, the test item was observed to be a viscous liquid.
DATA HANDLING
Boiling temperature: the mean extrapolated onset temperature of DSC Experiment 3 (245.9°C) and DSC Experiment 4 (245.7°C).
Description of key information
No melting/freezing point down to -83.3°C (visual observation and DSC experiment, EC A.1, OECD 102, OPPTS 830.7200).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -83.3 °C
Additional information
DSC showed no effect due to freezing of the substance between 25°C and -90°C. After storage in freezers, the substance was visually observed to be a liquid at ca. -20°C and a viscous liquid at ca. -80°C.
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