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EC number: 279-087-4 | CAS number: 79135-87-8
- 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:
- January from the 16th to the 30th, 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- and capillary method
- Decomposition:
- yes
- Decomp. temp.:
- 280 °C
- Conclusions:
- The test item decomposes before melt, starting at a temperature of approx. 280 °C.
- Executive summary:
The melting temperature of the test substance was investigated using the Differential Scanning Calorimetry method and results were confirmed by the capillary method. The procedures used in the study were in accordance with OECD Test Guideline No.102.
The test item showed abroad endothermic effect starting at a temperature of approx. 55 °C, a second broad endothermic effect starting at a temperature of approx. 280 °C and a third broad endothermic effect starting at a temperature of approx. 429 °C. No further endothermic or exothermic effect was observed up to a temperature of 500 °C. To verify the results of the DSC measurement, three additional measurements by the capillary method (Apparatus: Stuart Melting Point SMP30) were performed in the temperature range of 25 – 400 °C with a heating rate of 10 K/min. While heating the test item, its structure became crystalline and liquid formed at the opening of the capillary. In view of this observation, the broad endothermic effect starting at 55 °C in the DSC measurements with open crucibles is probably caused by the simultaneous phase change of the test item, separation of liquid water from the test item and evaporation of that water. Anyway, this endothermic effect cannot be assigned to the melting of the test item.
Starting at a temperature of approx. 320 °C the test item became brown but did not liquefy. So the second broad endothermic effect also cannot be assigned to the melting of the test item. Even though the DSC measurements performed using the open aluminium crucibles did not show an exothermic effect, the observation made during the measurements by the capillary method suggest that the test item starts to decompose at a temperature of 320 °C.
Conclusion
The test item decomposes before melt, starting at a temperature of approx. 280 °C.
Reference
The test item showed abroad endothermic effect starting at a temperature of approx. 55 °C, a second broad endothermic effect starting at a temperature of approx. 280 °C and a third broad endothermic effect starting at a temperature of approx. 429 °C. No further endothermic or exothermic effect was observed up to a temperature of 500 °C.
Sample weight / mg | Onset of Effect / °C | Energy / (J/g) | Weight loss / mg | Atmospheric pressure / hPa |
8.35 | 65.8 280.1 428.5 |
+240 +30 +90 |
3.94 | 982 |
5.08 | 54.8 279.8 429.1 |
+240 +30 +100 |
2.34 | 990 |
To verify the results of the DSC measurement, three additional measurements by the capillary method (Apparatus: Stuart Melting Point SMP30) were performed in the temperature range of 25 – 400 °C with a heating rate of 10 K/min.
While heating the test item, its structure became crystalline and liquid formed at the opening of the capillary. In view of this observation, the broad endothermic effect starting at 55 °C in the DSC measurements with open crucibles is probably caused by the simultaneous phase change of the test item, separation of liquid water from the test item and evaporation of that water. Anyway, this endothermic effect cannot be assigned to the melting of the test item.
Starting at a temperature of approx. 320 °C the test item became brown but did not liquefy. So the second broad endothermic effect also cannot be assigned to the melting of the test item. Even though the DSC measurements performed using the open aluminium crucibles did not show an exothermic effect, the observation made during the measurements by the capillary method suggest that the test item starts to decompose at a temperature of 320 °C.
Description of key information
The test item decomposes before melt, starting at a temperature of approx. 280 °C.
Key value for chemical safety assessment
Additional information
OECD 102 - DSC and capillary methods
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