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EC number: 276-123-0 | CAS number: 71873-46-6
- 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 January 03rd to March 06th, 2018
- 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:
- other: OECD Test 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.:
- ca. 110 °C
- Conclusions:
- Decomposition before melting/boiling at ca 110 °C.
- Executive summary:
The thermal behaviour of the substance was assessed 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). The test item was weighed out into an aluminium crucible under air atmosphere; two tests were run. The temperature of the apparatus was up to 500 °C at a constant heating rate of 10 K/min under an inert atmosphere. In order to confirm the study outcomes, a second test was conducted using capillary method.
In addition, the thermal behaviour was further investigated placing the test item in a closed glass crucible. The determination of the thermal stability of a substance was performed via Differential Scanning Calorimetry (DSC), heating the apparatus from room temperature up to 500 °C, with a heating rate of 3 K/min. Two investigations were performed.
In the temperature range of 50 – 150 °C, an endothermic effect was observed, which may be caused by the drying of the test item (3.2 % water). Between 220 – 280 °C a second endothermic effect could be detected. In the temperature range of 320 – 480 °C, a broad exothermic effect was observed. To verify the results of the DSC measurement, an additional measurement with the capillary method was performed in the temperature range of 70 – 300 °C with a heating rate of 10 K/min. The test item showed no melting in the temperature range from 70 to 220 °C. At a temperature of 220 °C the colour of the test item partially changed to grey. Above 250 °C the test item liquefied under decomposition and an increase of volume of the test item and the colour changed to black. Due to this result, the endothermic effect, observed during the heating phase in the temperature range of 50 – 150 °C, cannot be associated with the melting of the test item.
The second endothermic signal in the temperature range of 220 – 280 °C can be associated with a liquefying under decomposition. Due to this result, the test item shows no melting or boiling until the decomposition starting at a temperature of approx. 110 °C. In the temperature range of 110 – 240 °C an exothermic effect can be observed, with a maximum decomposition energy of -320 J/g.
Conclusion
Decomposition before melting/boiling at ca 110 °C.
Reference
MELTING - BOILING POINT
In the temperature range of 50 – 150 °C, an endothermic effect was observed, which may be caused by the drying of the test item (3.2 % water). Between 220 – 280 °C, a second endothermic effect could be detected. In the temperature range of 320 – 480 °C, a broad exothermic effect was observed.
No. | Sample weight / mg | Onset of effect / °C | Range of effect / °C | Weight loss / mg | Atmospheric pressure / hPa |
Rep. 1 | 10.3 | 80.99 | 50 – 150 (endo) | 6.91 | 994.1 |
223.58 | 220 – 280 (endo) | ||||
--- | 320 – 480 (exo) | ||||
Rep. 2 | 10.8 | 85.13 | 60 – 150 (endo) | 7.49 | 994.1 |
223.14 | 220 – 280 (endo) | ||||
--- | 320 – 480 (exo) |
CAPILLARY MEASUREMENT
To verify the results of the DSC measurement, an additional measurement with the capillary method was performed in the temperature range of 70 – 300 °C with a heating rate of 10 K/min. The test item showed no melting in the temperature range from 70 to 220 °C. At a temperature of 220 °C the colour of the test item partially changed to grey. Above 250 °C the test item liquefied under decomposition and an increase of volume of the test item and the colour changed to black.
Due to this result, the endothermic effect which was observed during the heating phase in the temperature range of 50 – 150 °C, cannot be associated with the melting of the test item.
The second endothermic signal in the temperature range of 220 – 280 °C can be associated with a liquefying under decomposition.
Due to this result, the test item shows no melting or boiling until the decomposition starting at a temperature of approx. 110 °C.
THERMAL STABILITY
In the temperature range of 110 – 240 °C an exothermic effect can be observed, with a maximum decomposition energy of -320 J/g.
No. | Sample weight / mg | Start / °C | Energy / J/g |
Rep. 1 | 6.72 | 110 (exothermic) | -320 |
Rep. 2 | 8.01 | 120 (exothermic) | -240 |
Description of key information
Decomposition before melting/boiling at ca. 110 °C.
Key value for chemical safety assessment
Additional information
OECD 102/113 - Differential Scanning Calorimetry (DSC) and capillary methods
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