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Diss Factsheets
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EC number: 916-540-3 | 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:
- January from 19 to 29, 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Qualifier:
- according to guideline
- Guideline:
- other: OECD guideline 113 (Thermal Stability)
- Version / remarks:
- 1981
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- and capillary method
- Decomposition:
- yes
- Decomp. temp.:
- 290 °C
- Conclusions:
- The substance decomposes before melt (290 °C).
- Executive summary:
The substance thermal behaviour was investigated in accordance with OECD guidelines 102 and 113.
The determination of the melting and boiling point of the test item was performed using Differential Scanning Calorimetry (DSC) and confirmed by measurements with the capillary method.
In the temperature range of 50 to 140 °C, a broad endothermic effect was observed. Between 150 °C and 170 °C a second endothermic effect was detected. A third endothermic effect was detected between 280 and 300 °C, which leaded directly to an exothermic effect with an energy release of -400 J/g. In the measurement, the third endothermic effect was overlaid from the exothermic effect starting at approx. 290 °C with an energy release of -310 J/g.
During the heating phase two, respectively three endothermic effects were observed, which can be assigned to a drying of the test item (evaporation of water contained in the test item). The test item showed an exothermic signal starting at 290 °C, which can be assigned to decomposition.
To verify the results of the DSC measurement, three additional measurements with the capillary method were performed: according to the observations, the endothermic effects starting at approx. 50 °C and at 150 °C in the DSC measurements with open crucibles cannot be assigned to the melting of the test item, since the test item did not change its appearance. Since the test item contains 8.5 wt.-% water, it can be assumed, that the first endothermic effect is caused by the drying of the test item. The second endothermic effect observed in the DSC measurements is probably caused by a phase transformation. Starting at a temperature of approx. 260 °C the test item becomes black and starts to decompose. The decomposition was accomplished at a temperature of approx. 290 °C. Due to the fact that a sharp exothermic effect was observed in the DSC measurements starting at a temperature of approx. 290 °C, the effect cannot be associated with a melting or boiling. It can be stated that the test item has no melting point and no boiling point up to its decomposition.
Conclusion
The substance decomposes before melt (290 °C).
Reference
DSC ANALYSIS
In the temperature range of 50 to 140 °C, a broad endothermic effect was observed. Between 150 °C and 170 °C a second endothermic effect was detected. A third endothermic effect was detected between 280 and 300 °C, which leaded directly to an exothermic effect with an energy release of -400 J/g. In the measurement, the third endothermic effect was overlaid from the exothermic effect starting at approx. 290 °C with an energy release of -310 J/g.
During the heating phase two, respectively three endothermic effects were observed, which can be assigned to a drying of the test item (evaporation of water contained in the test item). The test item showed an exothermic signal starting at 290 °C, which can be assigned to decomposition.
Sample weight / mg | Onset of Effect / °C | Range of effect / °C | Weight loss / mg | Atmospheric pressure / hPa |
8.54 | 65.6 | 50 – 140 (endo) | 2.56 | 998.3 |
149.7 | 150 – 170 (endo) | |||
287.3 | 280 – 300 (endo) | |||
300 | 300 – 350 (exo) | |||
7.23 | 56.5 | 50 – 120 (endo) | 2.02 | 1010.3 |
150.1 | 150 – 170 (endo) | |||
290 | 290 – 330 (exo) |
CAPILLARY METHOD
To verify the results of the DSC measurement, three additional measurements with the capillary method were performed in the temperature range of 25 – 350 °C with a heating rate of 10 K/min. According to the observations during the tests with the capillary method, the endothermic effects starting at approx. 50 °C and at 150 °C in the DSC measurements with open crucibles cannot be assigned to the melting of the test item, since the test item did not change its appearance. Since the test item contains 8.5 wt.-% water, it can be assumed, that the first endothermic effect is caused by the drying of the test item. The second endothermic effect observed in the DSC measurements is probably caused by a phase transformation. Starting at a temperature of approx. 260 °C the test item becomes black and starts to decompose. The decomposition was accomplished at a temperature of approx. 290 °C. Due to the fact that a sharp exothermic effect was observed in the DSC measurements starting at a temperature of approx. 290 °C, the effect cannot be associated with a melting or boiling. It can be stated that the test item has no melting point and no boiling point up to its decomposition.
Description of key information
The substance decomposes before melt (290 °C).
Key value for chemical safety assessment
Additional information
OECD 102/113 - Differential Scanning Calorimetry and capillary method
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