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Diss Factsheets
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EC number: 257-775-5 | CAS number: 52238-69-4
- 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 July 25 to November 11, 2017
- 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
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Test Guideline 113: Thermal Stability
- Version / remarks:
- 1981
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- 1998
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- and capillary method
- Decomp. temp.:
- 270 - 280 °C
- Decomp. temp.:
- 300 °C
- Conclusions:
- The substance decomposes before melting (270 and 300 °C).
- Executive summary:
The thermal behaviour of test item was assessed using the DSC analysis, according to the OECD guideline 102 and OECD guideline 113. To verify the results of the DSC measurement, three additional measurements with the capillary method were performed from room temperature to 300 °C with a heating rate of 10 K/min.
The test item has no melting point up to its decomposition as determined by differential scanning calorimetry and capillary method.
In the DSC-measurements the test item showed a first exothermic effect from 220 °C with an average energy release of -20 J/g. An endothermic effect is detected from 240 °C. This effect led into an exothermic effect, starting from 260 °C with an average energy release of -350 J/g.
Conclusion
The substance decomposes before melting (270 and 300 °C).
Reference
MELTING POINT - DSC method
Starting at a temperature of 80 °C and 270 °C the test item showed two endothermic effects, which cannot be clearly assigned to a melting of the test item. An exothermic effect was detected starting at a temperature of 300 °C with an averaged energy release of -230 J/g.
Results of DSC analysis
No. | Sample weight (mg) | Onset of Effect (°C) | Range of effect (°C) | Weight loss (mg) | Atmospheric pressure (hPa) |
PN13885 | 18.68 | 100 | 50 | 5.01 | 996.1 |
270 | 30 | ||||
300 | -180 | ||||
PN13886 | 13.17 | 80 | 80 | 3.48 | 996.1 |
280 | 10 | ||||
300 | -280 |
MELTING POINT - capillary method
Starting at a temperature of approx. 288 °C the colour of the test item gets darker. At a temperature of approx. 305 °C the colour turned into black and test item started to decompose. Between 25 – 300 °C no melting of the test item could be observed. According to the observations during the tests with the capillary method, the endothermic effects in the DSC measurements with open crucibles cannot be assigned to the melting of the test item. Since the test item contains 2.3 % water, it can be assumed, that the endothermic effect is caused by the drying of the test item.
THERMAL STABILITY
The test item shows a first exothermic effect from 220 °C with an average energy release of -20 J/g. An endothermic effect is detected from 240 °C. This effect leads into an exothermic effect, starting from 260 °C with an average energy release of -350 J/g.
No. | Sample weight (mg) | Start of effect (°C) | Energy (J/g) |
PN13874 | 7.43 | 220 | -10 |
240 | 20 | ||
260 | -320 | ||
PN13875 | 7.32 | 220 | -20 |
240 | 20 | ||
260 | -380 |
Description of key information
The substance decomposes before melting/boiling (at ca 270 - 300 °C).
Key value for chemical safety assessment
Additional information
OECD 102 and OECD 113 - DSC analysis and capillary method
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