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EC number: 233-360-4 | CAS number: 10128-55-9
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:
- 2017-08-22
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- 2017-02-28
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- 194.4 °C
- Atm. press.:
- 1 008 hPa
- Decomposition:
- yes
- Decomp. temp.:
- 300 °C
- Sublimation:
- no
- Conclusions:
- The test item N-[2-(4-oxo-4H-3,1-benzoxazin-2-yl)phenyl]naphthalene-2-sulphonamide has a melting point of 194.4 °C at atmospheric pressure (1008 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
Reference
In the temperature range of 180 °C – 210 °C an endothermic effect (melting) was observed. No further endothermic effects was observed up to the decomposition of the test item in the temperature range of 300 °C – 350 °C, with a mean decomposition energy of approx. 180 J/g. No further thermic effects could be observed up to the maximum measured temperature of 500 °C.
Results of the DSC-measurements
No. |
Sample weight / mg |
Onset of Effect / °C |
Range of effect / °C |
Weight loss / mg |
Atmospheric pressure / hPa |
1 |
9.18 |
194.65 |
180 – 210 (endo) |
4.27 |
1007.5 |
2 |
10.45 |
194.10 |
180 – 210 (endo) |
5.15 |
1007.5 |
During the heating phase a distinct endothermic effect was observed in the temperature range of 180 – 210 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests do deviate by less than 0.5 K from their mean value of 194.38 °C, this temperature can be used as melting point. The test item has a melting point of 194.4 °C.
Since no further endothermic effects could be observed up to the decomposition of the test item started at 300 °C, it can be stated that the test item has no boiling point up to its decomposition.
Description of key information
The test item N-[2-(4-oxo-4H-3,1-benzoxazin-2-yl)phenyl]naphthalene-2-sulphonamide has a melting point of 194.4 °C at atmospheric pressure (1008 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 194.4 °C
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