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Diss Factsheets
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EC number: 947-853-3 | 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:
- 2017-11-08 to 2018-04-13
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- adopted on 27 July 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 30 May 2008
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- > 9 - < 63 °C
- Atm. press.:
- 1 013 Pa
- Decomposition:
- yes
- Decomp. temp.:
- >= 280 °C
- Sublimation:
- no
- Remarks on result:
- other:
- Remarks:
- The substance is a mixture of substances with various alky chain length, thus a defined melting point could not be detected.
- Conclusions:
- A defined melting point is not assessable, a melting range which can be explained by the broad chain length variety of the alkyl moieties, is reported instead. As an average, a melting range of 9 °C to 63 °C was measured by DSC which is lower as the clear point of 77 °C recorded at the visual observation, however, this may be falsified by by-products.
- Executive summary:
In study performed according to OECD guideline 102 the melting point of the test substance was investigated by differential scanning calorimetry and thermogravimetric measurement. At the main DSC tests, an endothermic signal was recorded over a temperature range of 9 °C to 63 °C, which can be attributed to the melting procedure as in the DSC main tests corresponding comparable exothermic signals were recorded.
The broad temperature range at which the melting process was detected can be explained by the broad chain length variety of the alkyl moieties. Thus, a defined melting point is not assessable, a melting range is reported instead.
As an average, a melting range of 9 °C to 63 °C was measured by DSC which is lower as the clear point of 77 °C recorded at the visual observation, however, this may be falsified by by-products.
Since the substance is an UVCB, the starting melting point of the main constituents can be assumed to be at 63°C.
The recorded main weight loss above 306.4 °C (estimated onset on TGA) may indicate a beginning evaporation (boiling), however, from the knowledge of the chemical structures this endotherm is most likely allocated to a degradation process.
This assumption can also be deduced from the literature, as it is well known that quaternary structures tend to degrade above temperatures of 120 °C (Hoffmann degradation; reversed Menshutkin reaction).
In order to provide evidence for this assumption, a degradation test was performed during which an aliquot of the sample was heated to 280 °C for 15 minutes. The remaining residue (97 % of the original material) war characterised by NMR spectroscopy. The NMR analysis confirms the decomposition of the product. Consequently, hydrogenated tallow/nortallow based IQAC does not provide a boiling point until disintegration at about 280 °C.
Reference
According to the visual inspection, the test item liquefies at 77 °C. At the DSC tests no particular melting point, but a melting range was detected, which was to be expected as test substance is a mixture of substances with various alky chain length. For the determination of the melting range, the main DSC test was performed in triplicate. The melting ranges were read from the second and the third heating run of each test as the peak top temperature of the allocated melting peak.
After the test procedure, the samples were re-weighed in order to check for a significant sample loss indicating potential interfering non-melting processes. For none of the samples a significant weight loss was recorded (< 0.5 %).
Description of key information
- study conducted according to OECD guideline 102, differential scanning calorimetry, thermogravimetriv measurement, capillary method, based on different methods used the melting point is considered to be between 9 and 63°C, the clear point of 77 °C was recorded at the visual observation
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 63 °C
Additional information
In study performed according to OECD guideline 102 the melting point of the test substance was investigated by differential scanning calorimetry and thermogravimetric measurement. At the main DSC tests, an endothermic signal was recorded over a temperature range of 9 °C to 63 °C, which can be attributed to the melting procedure as in the DSC main tests corresponding comparable exothermic signals were recorded.
The broad temperature range at which the melting process was detected can be explained by the broad chain length variety of the alkyl moieties. Thus, a defined melting point is not assessable, a melting range is reported instead.
As an average, a melting range of 9 °C to 63 °C was measured by DSC which is lower as the clear point of 77 °C recorded at the visual observation, however, this may be falsified by by-products. Since the substance is an UVCB, the starting melting point of the main constituents can be assumed to be at 63°C.
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.
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