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EC number: 452-330-3 | 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:
- 20 March 2003 to 25 June 2003
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- 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)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- capillary method
- Melting / freezing pt.:
- ca. 186 °C
- Decomposition:
- yes
- Decomp. temp.:
- 186 °C
- Remarks on result:
- other: The melting range was dependent upon the heating rate and starting temperature of the equipment. 186 °C is quoted as the starting value for the melting range as the end of the melting range could not be determined.
- Conclusions:
- From the determinations where the fastest heating rate were employed, i.e. 3.0 °C/minute, the start of melting was determined to be 186.4 °C. In these determinations the lowest level of decomposition should have occurred. As the melting range of the test material is dependent upon the conditions used for its determination a final value for the start of melting of 186 °C is quoted. The study is considered to be reliable, relevant and adequate for risk assessment purposes.
- Executive summary:
The melting behaviour of the test material was determined in accordance with standardised guidelines OECD 102, EU Method A.1 and EPA OPPTS 830.7200 using the capillary method with photocell detection. The test material was found to melt with thermal decomposition, the level of which influences the temperature range within which melting occurs. The melting range was determined to start around 186 °C.
Reference
Table 1: Results
Heating Rate (°C) |
Initial Temperature (°C) |
Start of Melting (°C) |
Comments |
|
Individual |
Average |
|||
1.0 |
150.0 |
180.9 |
180.8 |
Discontinued at 190.0 °C. Red discolouration and evidence of sublimination |
180.8 |
||||
180.6 |
||||
0.2 |
175.0 |
181.0 |
181.0 |
Discontinued at 185.5 °C. Brown discolouration and evidence of sublimination |
180.8 |
||||
181.1 |
||||
0.2 |
177.0 |
181.3 |
181.4 |
Discontinued at 185.3 °C. Brown discolouration and evidence of sublimination |
181.3 |
||||
181.5 |
||||
0.2 |
178.0 |
181.6 |
181.6 |
Discontinued at 183.0 °C. Brown discolouration and evidence of sublimination |
181.6 |
||||
181.7 |
||||
3.0 |
175.0 |
186.5 |
186.4 |
Discontinued at 190.0 °C. Brown discolouration and evidence of sublimination |
186.5 |
||||
186.1 |
The end of the melting process could not be determined in any of the determinations performed. The discolouration suggested that the test material was decomposing during the melting process.
Additionally, it was noted that the start of the melting process was dependent on both the heating rate and the starting temperature. A faster heating rate yielded a higher value for the start of melting and so did a higher starting temperature. This also indicated that decomposition was occurring alongside melting, since with faster heating rates and higher starting temperature the samples are heated for shorter times before reaching the start of the melting process, thereby reducing the level of any decomposition that may have occurred. The presence of decomposition products would tend to lower the melting range.
Description of key information
Melting commences around 186 °C (decomposition and sublimation prevents accurate determination), OECD 102, EU method A.1, capillary method, Das 2003
Key value for chemical safety assessment
Additional information
The melting behaviour of the test material was determined in accordance with standardised guidelines OECD 102, EU Method A.1 and EPA OPPTS 830.7200 using the capillary method with photocell detection. The test material was found to melt with thermal decomposition, the level of which influences the temperature range within which melting occurs. The melting range was determined to start around 186 °C.
The study was performed in line with GLP and accepted standardised guidelines with a high standard of reporting. The study was assigned a reliability score of Klimisch 1 and considered suitable for assessment as an accurate reflection of the test substance.
The available data is considered to be complete and the result determined, melting commences around 186 °C (decomposition and sublimation prevents accurate determination), was carried forward for risk assessment.
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