Registration Dossier
Registration Dossier
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EC number: 224-632-3 | CAS number: 4432-31-9
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:
- 2015-11-05 to 2016-04-19
- 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:
- Regulation (EC) No 440/2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 27 July 1995
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- capillary method
- Key result
- Melting / freezing pt.:
- ca. 335.5 °C
- Atm. press.:
- ca. 101 325 Pa
- Decomposition:
- yes
- Remarks:
- The substance appeared brown, indicating a decomposition at about 300 °C.
- Decomp. temp.:
- ca. 300 °C
- Sublimation:
- no
- Conclusions:
- The melting point of the test substance was determined to be 335.5 °C. Decomposition was observed at ca. 300 °C.
- Executive summary:
The melting point of the substance was determined in an experimental study under GLP conditions according to OECD Test Guideline 102. The determination of the melting temperature of the test substance was performed by the capillary method with hot block heating. The mean melting point was determined as 335.5 °C with a standard deviation of 0.36 °C (n=3), whereas decomposition was indicated by a change in the substance's colour (to brown) at approximately 300 °C.
Reference
At the start of the test at 240 °C the test substance was a white powder. The colour of the test substance changed to brown at about 300 °C and started melting at about 310 °C.
The results of 3 repeated determinations of the melting temperature of the test substance were: 335.1, 335.6 and 335.8 °C. The mean melting temperature of the test substance is 335.5 °C, with a standard deviation of 0.36 °C.
In each case the melted test substance appeared brown. The change of colour indicates decomposition of the test substance.
Description of key information
The melting point of the test substance was determined to be 335.5 °C. Decomposition was observed at ca. 300 °C (reference 4.2-1).
Key value for chemical safety assessment
Additional information
The melting point of the substance was determined in an experimental study under GLP conditions according to OECD Test Guideline 102. The determination of the melting temperature of the test substance was performed by the capillary method with hot block heating. The mean melting point was determined as 335.5 °C with a standard deviation of 0.36 °C (n=3), whereas decomposition was indicated by a change in the substance's colour (to brown) at approximately 300 °C.
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