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Diss Factsheets
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EC number: 938-153-9 | 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
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 11 January 2012- 25 April 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: The study has been performed according to OECD and EC guidelines and according to the principles of GLP.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
- Report date:
- 2012
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- (2008)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- (1995)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- (1998)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- thermal analysis
- Remarks:
- (differential scanning calorimetry)
Test material
- Reference substance name:
- Paz-E
- IUPAC Name:
- Paz-E
- Details on test material:
- Name of test material (as cited in study report): Paz-E
Substance type: mono-constituent
Physical state: white powder
Expiration date of the lot/batch: 25 November 2012
Storage condition of test material: At room temperature protected from light in desiccator (sample is hygroscopic)
Stability under test conditions: Stable
Constituent 1
Results and discussion
Melting / freezing pointopen allclose all
- Melting / freezing pt.:
- 119 °C
- Decomposition:
- yes
- Decomp. temp.:
- >= 375 °C
- Melting / freezing pt.:
- 392 K
- Decomposition:
- yes
- Decomp. temp.:
- >= 648 K
Any other information on results incl. tables
Preliminary TGA
Starting at 400°C, the weight of the sample decreased significantly. At 421°C the sample weight had decreased by 25%. After the experiment, an expanded charred residue remained in the sample container (original colour: white). The change of the colour indicated reaction and/or decomposition of the test substance. TGA-curve: Figure 4 (see attachment).
DSC experiments
Experiment 1: An endothermic peak between 100°C and 150°C was observed. The extrapolated onset temperature of the peak was 119.51°C. The effect was most likely obtained due to melting of the test substance. After the experiment, an expanded charred residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test substance. DSC curve: Figure 5 (see attachment).
Experiment 2: To investigate the melting peak between 100°C and 150°C a repeated heating cycle was applied in the second experiment. With the first heating the extrapolated onset temperature of the melting peak was 118.52°C. During cooling no exothermic peak was observed which indicates that the test substance had not recrystallized. With the second heating therefore only an exothermic effect was observed between 375°C and 450°C. After the experiment, an expanded charred residue remained in the sample container. Figures 6 and 7 shows the DSC-curves obtained.
Experiment 3: A third experiment was performed with a lower end temperature. DSC curve: see Figure 8. The extrapolated onset temperature of the melting peak was 119.36°C. After the experiment, the sample pan was opened. It was visually observed that the test
substance had molten.
Experiment 4: The fourth experiment was performed as a duplicate of the first experiment. DSC curve: see Figure 9. Similar results as with the first experiment were obtained. The extrapolated onset of the melting peak was 118.60°C. After the experiment, an expanded charred residue remained in the sample container.
Applicant's summary and conclusion
- Conclusions:
- The melting temperature of Paz-E is 119°C. Decomposition starts at 375°C.
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