Registration Dossier
Registration Dossier
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EC number: 608-630-3 | CAS number: 31528-46-8
Flash point
Administrative data
- Endpoint:
- flash point of flammable liquids
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the flash point is only relevant to liquids and low melting point solids
Cross-referenceopen allclose all
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
- Endpoint:
- appearance / physical state / colour
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 10 March 2016 - 16 March 2016
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The appearance was determined by visual observation (direct and under a microscope). No guideline was followed for the appearance determination but sufficient details were given in the study report.
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- dd 13 January 2016
- Physical state at 20°C and 1013 hPa:
- solid
- Key result
- Form:
- solid: particulate/powder
- Colour:
- Off-white
- Odour:
- other: not determined
- Substance type:
- organic
- Conclusions:
- The substance is an off-white powder at room temperature.
A test substance sample was observed to be a fine off-white powder with some clusters.
From observations using a 3.2 objective lens, the particles appeared to be irregular shaped crystals.
From observations using a 40 objective lens, the sample was observed to be made up of single crystalline particles.
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 22 December 2017 - 07 June 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- 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
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 242.9 °C
- Decomposition:
- yes
- Decomp. temp.:
- > 275 °C
- Conclusions:
- The melting temperature of the substance was determined to be 242.9°C.
- Executive summary:
Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.
The melting temperature of the substance was determined in duplicate obtaining a mean value of 242.9°C.
Reaction and/or decomposition of the substance was observed at temperatures > 275°C.
Two experiments were performed to investigate the melting and boiling behaviour of the substance.
DSC EXPERIMENT 1
An endothermic peak was observed between 200°C and 250°C followed by an exothermic effect starting at 275°C (see the illustration below). The extrapolated onset temperature of the first peak was 242.969°C. The endothermic effect was most likely caused by melting of the test item. The exothermic effect was probably caused by reaction and/or decomposition of the test item.
After the experiment, a dark brown molten residue remained in the sample container (original colour: off-white). The change of the colour indicated reaction and/or decomposition of the test item.
DSC EXPERIMENT 2
In order to investigate the melting peak, in Experiment 2 heating was stopped directly after the melting effect. The extrapolated onset temperature was 242.887°C. After the experiment, a white molten residue remained in the sample container. It demonstrated that melting was the reason for the endothermic effect.
DATA HANDLING
The melting temperature was determined as the mean melting temperature of Experiment 1 and Experiment 2.
Data source
Materials and methods
Results and discussion
Applicant's summary and conclusion
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