Registration Dossier
Registration Dossier
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EC number: 254-754-2 | CAS number: 40027-38-1
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:
- 2018-07-24
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- Method AB46-1215, “Determination of melting point, boiling point and enthalpy using
Differential Scanning Calorimetry”. In agreement with standard test method “The thermal
Stability of Chemicals by Differential Scanning Calorimetry”, ASTM E 537 – 07
The analysis was performed with Differential Scanning Calorimetry on a Mettler DSC 1 under
nitrogen atmosphere (20 ml/min). The following temperature programming was used:
-30-400 ºC (5 ºC/min)
17.0 mg of sample was placed in a 40 μl aluminum cup. - GLP compliance:
- no
- Other quality assurance:
- ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- ca. 22.5 °C
- Decomposition:
- yes
- Decomp. temp.:
- ca. 188.7 °C
- Conclusions:
- Melting temperature is detected at 22.5ºC. A negative peak at 188.67ºC could be boiling temperature or decomposition. A small amount of sample was tested n the oven at 190ºC for 30 minutes. No boiling bubbles were observed and the sample color became darker, thus the negative peak is interpreted as decomposition. DSC curve shows the sample decomposes from 145ºC to 400ºC
- Executive summary:
Melting temperature is detected at 22.5ºC and decomposion from 145 to 400ºC
Reference
Melting temperature is detected at 22.5ºC. A negative peak at 188.67ºC in Figure 1 could be boiling temperature or decomposition. A small amount of sample was tested in the oven at 190ºC for 30 minutes. No boiling bubbles were observed and the sample color became darker, thus the negative peak is interpreted as decomposition. DSC curve shows the sample decomposes from 145ºC to 400ºC
Description of key information
Melting point is 22.5 °C decomposes from 145ºC to 400ºC
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 22.5 °C
Additional information
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