Registration Dossier
Registration Dossier
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EC number: 242-044-5 | CAS number: 18162-84-0
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:
- 27-Feb to 16-Mar-2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- GLP compliance:
- not specified
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- -49 °C
- Atm. press.:
- 1 013 hPa
- Conclusions:
- A melting point value of -49 °C at 1013 hPa was determined in a reliable study conducted according to an appropriate test protocol.
Reference
Results
The heat flow curve shows two sharp endothermic peaks: one with a peak maximum temperature at -46/-46 °C and an extrapolated onset temperature of -49/-49 °C, indicating the melting temperature.
It is to be noted that crystallisation processes are often impaired by supercooling, due to a kinetic delay of the transformation caused by inhibited nucleation. Thus the measured transformation temperature does not necessarily correspond to the thermodynamic equilibrium temperature, but is strongly dependant on the thermal history of the sample and the applied cooling rate. Therefore cooling and heating cycle yield different enthalpy profiles.
Melting point: -49 °C
Description of key information
Chloro(dimethyl)octylsilane: -49 °C (Differential scanning calorimetry, EU Method A.1)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -49 °C
Additional information
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