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EC number: 249-033-4 | CAS number: 28462-17-1
- 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
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:
- From March 29th to May 6th, 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- GLP compliance:
- no
- Type of method:
- other: Differential scanning calorimetry and capillary method
- Atm. press.:
- 1 017.4 hPa
- Decomposition:
- yes
- Remarks:
- at atmospheric pressure
- Decomp. temp.:
- ca. 120 °C
- Conclusions:
- The test item has no melting point up to the decomposition temperature of approx. 120°C at atmospheric pressure (1017.4 hPa) as determined by differential scanning calorimetry and capillary method according to OECD guideline 102 (1995). The decomposition is accompanied by liquification of the test item.
- Executive summary:
The test item was weighed into the aluminium crucible under air. Two test with about 9 -12 mg of the test item were performed. After weighing, the perforated lid was attached using a crucible press. As reference crucible, an empty aluminium crucible was used. The determination of the melting point of the test item was performed via DSC. The prepared crucibles (crucible with test item and reference crucible) were placed in the DSC apparatus. At ambient conditions, the test item is a solid. Therefore the crucibles were heated up from room temperature to 500°C at a constant heating rate of 10 K/min under air.
The melting behavior of the test item was verified by measurements with the capillary method. A small quantity of the test item was filled up to 4 -5 mm into a capillary and compacted by tapping on the capillary. The capillary and a thermometer were heated in the BÜCHI melting point apparatus from 30°C to 350°C with a heating rate of 10 K/min. the test item was observed while being heated. When the test item started to melt, the actual temperature was recorded.
The test item showed an endothermic effect in the temperature range of approx. 120 -170°C, followed by a broad exothermic effect in the temperature range of approx. 210 -410°C, with a mean energy release of -790 J/g.
To verify the results of the DSC measurements, three additional measurement with the capillary method were performed in the temperature range of 30 °C to 350 °C with a heating rate of 10 K/min. Starting at a temperature of approx. 130 °C the test item's colour turned darker indicating the start of a decomposition process. At approx. 150 °C the test item liquified and turned black. At approx. 150 °C the black test item crept up the walls of the capillary. The measurements were terminated at 350 °C.
Combining the results of the DSC-measurements and the capillary method, no melting of the test item could be observed, the melting point can not be separated from a decomposition reaction under air that starts before the exothermic effect is detected in the DSC. The test item started to decompose at approx. 120 °C.
Reference
-Melting point (DSC)
The test item showed an endothermic effect in the temperature range of approx. 120 -170°C, followed by a broad exothermic effect in the temperature range of approx. 210 -410°C, with a mean energy release of -790 J/g.
Results of the DSC-measurements
No. | Sample weight [mg] | Onset of Effect [°C] | Range of effect [°C] | Weight loss [mg] | Atmospheric pressure [hPa] |
PN17539 | 9.25 | 152.82 | 120 – 170 (endo) | 4.42 | 1017.4 |
--- | 220 – 380 (exo) | ||||
PN17540 | 11.5 | 154.31 | 120 – 170 (endo) | 5.39 | 1017.4 |
--- | 210 – 410 (exo) |
-Measurements by the capillary method
To verify the results of the DSC measurements, three additional measurement with the capillary method were performed in the temperature range of 30 °C to 350 °C with a heating rate of 10 K/min. Starting at a temperature of approx. 130 °C the test item's colour turned darker indicating the start of a decomposition process. At approx. 150 °C the test item liquified and turned black. At approx. 150 °C the black test item crept up the walls of the capillary. The measurements were terminated at 350 °C.
Combining the results of the DSC-measurements and the capillary method, no melting of the test item could be observed, the melting point can not be separated from a decomposition reaction under air that starts before the exothermic effect is detected in the DSC. The test item started to decompose at approx. 120 °C.
Description of key information
The test item has no melting point up to the decomposition temperature of approx. 120 °C at atmospheric pressure (1017.4 hPa) as determined by differential scanning calorimetry and capillary method. The decomposition is accompanied by liquification of the test item.
Key value for chemical safety assessment
Additional information
OECD guideline 102 (1995).
The test item was weighed into the aluminium crucible under air. Two test with about 9 -12 mg of the test item were performed. After weighing, the perforated lid was attached using a crucible press. As reference crucible, an empty aluminium crucible was used. The determination of the melting point of the test item was performed via DSC. The prepared crucibles (crucible with test item and reference crucible) were placed in the DSC apparatus. At ambient conditions, the test item is a solid. Therefore the crucibles were heated from room temperature up to 500 °C at a constant heating rate of 10 K/min under air.
The melting behavior of the test item was verified by measurements with the capillary method. A small quantity of the test item was filled up to 4 -5 mm into a capillary and compacted by tapping on the capillary. The capillary and a thermometer were heated in the BÜCHI melting point apparatus from 30 °C to 350 °C with a heating rate of 10 K/min. The test item was observed while being heated. When the test item started to melt, the actual temperature was recorded.
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