Registration Dossier
Registration Dossier
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EC number: 432-070-7 | CAS number: -
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:
- april 2000 - may 2000
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- capillary method
- Decomposition:
- yes
- Decomp. temp.:
- ca. 220 °C
- Remarks on result:
- other: Preliminary Test
- Decomposition:
- yes
- Decomp. temp.:
- ca. 207 °C
- Remarks on result:
- other: Main test
- Conclusions:
- The substance obviously decomposes before reaching a melting point (< 207 °).
No melting of the test substance was observed below 280 °C. - Executive summary:
No melting of the test substance is observed below 280 °C. However a decomposition of the test substance starts below 207 °C. At this temperature, the colour changes from white to slight grey-brown. A visuell determination of the exact decomposition temperature is not possible since the colour of the test substance changes very slowly from white to slight grey-brown.
Reference
Preliminary Test: The test was started at 20 °C by heating the liquid bath in steps of 50 K. At approximately 220°C test substance started to decompose. The colour changed from white to slight grey-brown. No melting was observed below 280 °C.
Main test: The main test was performed two times. No melting was observed below 280 °C in each test. Each test showed a change in colour from white to slight grey-brown beginning at approximately 207 °C. It was not possible to determine exactly the temperature of the beginning of the decomposition because the colour of the test substance changed very slowly from white to slightly grey-brown.
Table 1 : Data for determination of the melting point
| Test no | Melting temperature [°C] | Heating rate [K/min] | beginning at [°C] |
| 1 | - | 3 | 207 |
| 2 | - | 3 | 207 |
| 3 | - | - | 207 |
Description of key information
No melting of the test substance was observed below 280 °C.
Decomposition occurs at temperatures > 200 °C
Key value for chemical safety assessment
Additional information
No melting of the test substance was observed below 280 °C. It was noticed that the test substance decomposed due the colour change from white to slight grey-brown beginning at approximately 207 °C. It was not able to determine exactly the temperature of the beginning decomposition because the colour of the test substance changed very slowly from white to slight grey-brown. The DSC indicates that the decomposition starts at temperatures at ca. 200 °C.
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