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Diss Factsheets
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EC number: 948-061-0 | 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:
- 30 November 2016 - 16 August 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- The study was conducted according to an internationally recognised method, and under GLP. The substance is considered to be adequately characterised. Therefore full validation applies.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- 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:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- UK GLP compliance programme (inspected on 05 July 2016 / signed on 28 Octobre 2016)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- ca. 188 °C
- Atm. press.:
- ca. 102 kPa
- Decomposition:
- yes
- Remarks on result:
- other: The test item was determined to decompose with softening/melting from approximately 188 °C (461 K) at 102 kPa.
- Conclusions:
- The test item was determined to decompose with softening/melting from approximately 188 °C (461 K) at 102 kPa.
- Executive summary:
A GLP study was performed in order to determine the melting point of test item according OECD 102, resp. EU A.1 guideline, using the DSC method.
The tests performed indicate that the appearance of the test item changed from a white powder to a yellow, orange and then light brown melted residue around the periphery of the crucible base as the temperature increased, suggesting that decomposition and softening/melting of the test item occurred. The weight loss recorded for the crucibles also indicated vaporization of the decomposition products at high temperatures.
Visual tests (metal block, liquid bath) were performed, but inconsistent temperature readings were obtained, so the observations were only used to aid with the interpretation of the thermograms. The final temperatures at which the thermal events occurred have therefore been taken from the DSC experiments, specifically from those performed at a heating rate of 5 °C/min, as this technique provides constant and reproducible heating of the samples.
The first endotherm/double endotherm from approximately 28 °C (301 K) at 102 kPa could not be attributed to a phase transition, degradation or the loss of a volatile component.
Reference
Results
The thermograms and thermographic data for the determinations are shown in following figures and tables on the experimental report:
DSC Determination 1:
20 to 350°C at 20K/min
Atmospheric pressure: 103.3kPa
Crucible mass loss: 82%
Thermal events: endotherms at 38°C and at 180°C
DSC Determination 2:
20 to 350°C at 20K/min
Atmospheric pressure: 103.3 kPa
Crucible mass loss: 74%
Thermal events: endotherms at 35°C and at 180°C
DSC Determination 3 (under nitrogen):
20 to 350°C at 20K/min
Atmospheric pressure: 103.3 kPa
Crucible mass loss: 22%
Interpretation of determination 3: The thermogram profile is comparable to those of the tests performed under air and the appearance of the residue also indicates degradation of the test item. The degradation of the test item is therefore considered to be probably thermal and not oxidative.
DSC Determination 4 and 5:
20 to 140°C at 1K/min
Atmospheric pressure: 103.3 kPa
Crucible mass loss: 0%
Interpretation of determinations 4 and 5: The appearance of the residue indicates that the test item does not degrade or experience a phase transition below 140 ºC (413K).
DSC Determination 6:
20 to 100 °C at 1 °C/min,
100 to 20 °C at -1 °C/min,
20 to 100 °C at 1 °C/min
Atmospheric pressure : 98.8 kPa
Crucible mass loss : 0%
Interpretation of determination 6: This experiment indicates that the initial double endotherm cannot be attributed to the loss of a volatile component.
DSC Determination 7:
20 to 400 °C at 5 °C/min
Atmospheric pressure : 102.0 kPa
Crucible mass loss : 94%
DSC Determination 8:
20 to 400 °C at 5 °C/min
Atmospheric pressure : 102.0 kPa
Crucible mass loss : 94%
Interpretation of determinations 7 and 8: The first double endotherm, which cannot be attributed to a phase transition, degradation or the loss of a volatile component, starts from approximately 28 °C (301 K). The second endotherm, attributed to decomposition of the test item with softening/melting, starts from approximately 188 °C (461 K) at 102 kPa.
Discussion
The tests performed indicate that the appearance of the test item changed from a white powder to a yellow, orange and then light brown melted residue around the periphery of the crucible base as the temperature increased, suggesting that decomposition and softening/melting of the test item occurred. The weight loss recorded for the crucibles also indicated vaporization of the decomposition products at high temperatures.
Visual tests (metal block, liquid bath) were performed, but inconsistent temperature readings were obtained, so the observations were only used to aid with the interpretation of the thermograms. The final temperatures at which the thermal events occurred have therefore been taken from the DSC experiments, specifically from those performed at a heating rate of 5 °C/min, as this technique provides constant and reproducible heating of the samples.
The first endotherm/double endotherm from approximately 28 °C (301 K) at 102 kPa could not be attributed to a phase transition, degradation or the loss of a volatile component.
Conclusion
The test item was determined to decompose with softening/melting from approximately 188 °C (461 K) at 102 kPa.
Description of key information
The test item was determined to decompose with softening/melting from approximately 188 °C (461 K) at 102 kPa.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 188 °C
Additional information
Afully reliable experimental study, conducted according to OECD 102/ EU A1/OPPTS guideline is available.
It is considered as a key study, and the result is retained as key data.
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