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Diss Factsheets
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EC number: - | 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_physical-and-chemical-properties.png)
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Experimental Starting Date: 20 July 2012; Experimental Completion Date: 23 January 2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study conducted to GLP and in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not effect the quality of the relevant results.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 013
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- other: differential scanning calorimetry
Test material
- Test material form:
- other: solid
Constituent 1
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- 132 °C
- Decomposition:
- yes
- Decomp. temp.:
- ca. 132 °C
- Remarks on result:
- other: The test item melted, with decomposition, from approximately 132 °C (405 K)
Any other information on results incl. tables
Results
Thermograms and thermographic data for determinations 1 and 2 are shown in Figure 3.1 and Figure 3.2 (attached background material), and in the following tables.
Table 3.2 Thermographic Data – Determination 1
Thermal Event |
Interpretation |
Temperature |
|
ºC |
K |
||
Approximate endotherm onset temperature. |
Approximate onset of melting with decomposition. |
131.70 |
405 |
Table 3.3 Thermographic Data – Determination2
Thermal Event |
Interpretation |
Temperature |
|
ºC |
K |
||
Approximate endotherm onset temperature. |
Approximate onset of melting with decomposition. |
136.24 |
409 |
Overall result: The test item melted, with decomposition, from approximately 132 °C (405 K)
Discussion:
Assignment of the thermographic data was performed with the assistance of observations recorded during a simplified liquid bath apparatus assessment of the test item. The test item was initially observed to be a beige paste-like consistency at the start of the assessment and then was observed to melt over a very broad range of approximately 100 to 160°C, discolouring with melting. Once liquefied, the test item continued to discolour as heating continued.
It can therefore be concluded that the test item decomposed during melting. Due to the initial low rate of enthalpy change during the melting/decomposition process, the onset temperature could only be approximated. Differences between the approximate onset temperatures observed by DSC and visual techniques may be attributable to the extremely subjective nature of the visual assessment for a substance of this physical state and/or the influence of heating rate on the decomposition process. However as the DSC heating rate is automated and repeatable, and quantification is taken from a defined thermal event, this has been taken as the definitive test result.
Typically a heating rate of 1 °C/minute would be used for definitive quantification of a melting temperature. However in this case, no definitive melting temperature was identified. The elevated heating rate of 20 °C/minute used in the reported determinations was considered optimal in this case as it aided integration of the onset reported (the low rate of enthalpy change observed would be further reduced with a decreased heating rate) and also, it minimized the influence of decomposition on the experimental results. At a reduced heating rate, the test item would be exposed to an elevated temperature for a longer time period which could potentially decrease the onset temperature of any thermal decomposition.
Applicant's summary and conclusion
- Conclusions:
- The test item melted, with decomposition, from approximately 132 °C (405 K).
- Executive summary:
Method
The determination was carried out using a differential scanning calorimetry procedure designed to be compatible with Method A1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008, Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995, and Method 830.7200 of the OPPTS Guidelines, March 1998.
Result
The test item melted, with decomposition, from approximately 132 °C (405 K).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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