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Diss Factsheets
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EC number: 909-129-5 | 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:
- from 31 July 2018 to 13 August 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Reference
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- from 31 July 2018 to 13 August 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Version / remarks:
- 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling Point)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
- Version / remarks:
- 1996
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Key result
- Boiling pt.:
- 187.3 °C
- Atm. press.:
- >= 1 006 - <= 1 010 hPa
- Conclusions:
- The boiling temperature of the substance was determined to be 187.3°C (at 1008 ± 2 hPa).
- Executive summary:
See IUCLID 4.2 melting point
see IUCLID 4.2 melting point
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2016
- 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
- Principles of method if other than guideline:
- No melting/freezing point could be determined by DSC. Therefore an additional experiment was performed in which the consistency of the substance was determined by visual observation after storage in freezers at ca. -20°C and at ca. -80°C. The additional experiment is not a guideline study but was described in sufficient detail in the study report.
- GLP compliance:
- yes
- Type of method:
- other: 'differential scanning calorimetry' and 'storage in freezer'
Test material
- Reference substance name:
- m,α-dimethylstyrene
- EC Number:
- 214-394-9
- EC Name:
- m,α-dimethylstyrene
- Cas Number:
- 1124-20-5
- Molecular formula:
- C10H12
- IUPAC Name:
- 1-isopropenyl-3-methylbenzene
- Reference substance name:
- p,α-dimethylstyrene
- EC Number:
- 214-795-9
- EC Name:
- p,α-dimethylstyrene
- Cas Number:
- 1195-32-0
- Molecular formula:
- C10H12
- IUPAC Name:
- 1-isopropenyl-4-methylbenzene
- Test material form:
- liquid
- Details on test material:
- Appearance: Clear colourless liquid
Storage conditions: At room temperature
Constituent 1
Constituent 2
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- < -80 °C
Any other information on results incl. tables
DSC EXPERIMENT 1
N crystallization effect was observed during cooling to -90°C. During heating an endothermic effect was observed between 150°C and 200°C (extrapolated onset temperature: 187.317°C). After the experiment it was observed that the test item had evaporated from the sample container. DSC curve: see illustration below.
DSC EXPERIMENT 2
In order to investigate the endothermic effect, a higher heating rate of 50°C/minute was used. The extrapolated onset temperature of the endothermic effect was 188.224°C. The endothermic effect had not shifted significantly to higher temperatures. It demonstrated that boiling of the test item caused the endothermic effect. After the experiment it was observed that the test item had evaporated from the sample container. Since a higher heating rate was used, the extrapolated onset temperature was not used in the calculation of the boiling point.
DSC EXPERIMENT 3
Similar results as in Experiment 1 were obtained. The extrapolated onset of the boiling effect was 187.343°C.
STORAGE IN FREEZER
After storage in a freezer (-24.1 ± 0.8°C) for 20 hours, the test item was observed to be a liquid.
After storage in freezer (-83.6 ± 1.6°C) for 20 hours, the test item was observed to be a liquid.
DATA HANDLING
Boiling temperature: the mean extrapolated onset temperature of DSC Experiment 1 (187.317°C) and DSC Experiment 3 (187.343°C).
Applicant's summary and conclusion
- Conclusions:
- The substance has no melting/freezing point at temperatures down to -80°C.
- Executive summary:
Differential Scanning Calorimetry was performed to determine the melting and boiling temperature. The experiments were based on EC A.1, OECD 102 and OPPTS 830.7200 (melting temperature) and on EC A.2, OECD TG 103 and OPPTS 830.722 (boiling temperature). There was no DSC effect due to melting/freezing of the liquid substance between 25°C and -90°C. The boiling temperature was determined from the extrapolated onset temperature of the endothermic boiling effect: 187.3°C at 1008 ± 2 hPa (mean of duplicate experiments).
After storage in freezers (ca -20°C and ca -80°C), the substance was visually observed to be a liquid. From this it was concluded that the substance has no melting/freezing point at temperatures down to -80°C.
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