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EC number: 250-528-2 | CAS number: 31242-17-8
- 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:
- 18 March 2019 to 18 April 2019
- 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:
- differential scanning calorimetry
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Lot/batch No.of test material: E01255-297
- Expiration date of the lot/batch: 31 December 2022 - Key result
- Melting / freezing pt.:
- >= 250 - <= 300 °C
- Decomp. temp.:
- > 300 - <= 400 °C
- Remarks on result:
- other: Part of the test item melts between 250-300 °C
- Key result
- Melting / freezing pt.:
- > 300 °C
- Decomp. temp.:
- > 300 - <= 400 °C
- Remarks on result:
- other: One part of the test item melts >300 °C
- Conclusions:
- The melting of the test item was determined by DSC. The melting temperature of a part of the test item was between 250 °C (523 K) and 300 °C (573 K). The melting temperature of another part of the test item was above 300 °C (above 573 K). Reaction and/or decomposition of the test item was observed between 300 °C (573 K) and 400 °C (673 K). Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started.
- Executive summary:
The study was performed based on procedures in the OECD Guideline 102 (Melting point / Melting Range); EU Method A.1 (Melting / Freezing Temperature); EPA OPPTS 830.7200 (Melting Point / Melting Range). The melting of the test item was determined by DSC. The melting temperature of a part of the test item was between 250 °C (523 K) and 300 °C (573 K). The melting temperature of another part of the test item was above 300 °C (above 573 K). Reaction and/or decomposition of the test item was observed between 300 °C (573 K) and 400 °C (673 K).
Reference
In the preliminary test the weight of the sample decreased significantly at a starting temperature of 425 °C. At 467 °C the sample weight had decreased by 25 %. After the experiment a black molten residue remained in the sample container (original colour: brown). The change of the colour indicated reaction and/or decomposition of the test item.
As part of the main study, Experiment 1, an endothermic effect was observed between 25 °C and 225 °C. The endothermic effect was most likely obtained due to evaporation of volatile components (based on the weight loss observed between 50 °C and 200 °C during the preliminary test). After the experiment, a dark brown molten residue remained in the sample container (original colour: brown). Based on this visual observation, it was found that the test item had molten. The change of the colour demonstrated reaction and/or decomposition of the test item. No clear effects were observed that could be attributed to melting or decomposition of the test item.
To investigate melting of the test item, a repeated heating cycle was applied in Experiment 2. During cooling, between the two heating cycles, no effects were observed. The endothermic effect observed with the first heating was not found during the second heating, indicating that the effect was due to evaporation of volatile components. No effects were observed which were due to melting and/or crystallization of the test item. After the experiment, a brown coagulated residue remained in the sample container.
Experiment 3 was performed as a duplicate of Experiment 1; similar results as in Experiment 1 were obtained. After the experiment, a dark brown molten residue remained in the sample container.
For visual observation of melting of the test item, Experiment 4, 5 and 6 were stopped at 205 °C, 255 °C and 305 °C, respectively. After Experiment 4 and 5, the sample appeared to be unchanged i.e. no melting and/or decomposition were observed. After Experiment 6 a brown coagulated residue remained in the sample container.
To investigate melting of the test item between 200 °C and 300 °C, a repeated heating cycle was applied in the Experiment 7. During cooling, between the two heating cycles, no effects were observed. No effects were observed which were due to melting and/or crystallization of the test item. After the experiment, a brown coagulated residue remained in the sample container.
No clear effects were observed that could be attributed to melting or decomposition of the test item. Based on visual observations, a change in consistency was observed between 250 °C and 300 °C (partially molten (coagulated)) and also at temperatures >300 °C (molten). Based on these results, it was concluded that part of the test item melts between 250 °C and 300 °C and another part of the test item melts >300 °C. Reaction and/or decomposition was visually observed between 300 °C and 400 °C.
Description of key information
The study was performed based on procedures in the OECD Guideline 102 (Melting point / Melting Range); EU Method A.1 (Melting / Freezing Temperature); EPA OPPTS 830.7200 (Melting Point / Melting Range). The melting of the test item was determined by DSC.
No clear effects were observed that could be attributed to melting or decomposition of the test item. Based on visual observations, a change in consistency was observed between 250 °C and 300 °C (partially molten (coagulated)) and also at temperatures >300 °C (molten). Based on these results, it was concluded that part of the test item melts between 250 °C and 300 °C and another part of the test item melts >300 °C. Reaction and/or decomposition was visually observed between 300 °C and 400 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 250 °C
Additional information
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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