Registration Dossier
Registration Dossier
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EC number: 221-339-2 | CAS number: 3069-42-9
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:
- 12 May to 28 May 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Remarks:
- Differential Scanning Calorimetry
- Melting / freezing pt.:
- 14 °C
- Remarks on result:
- other: No standard melting point was found. A melting of the main phase at approximately 14 °C (1013 hPa) was determined.
- Conclusions:
- No standard melting point was found. A melting of the main phase at approximately 14 °C (1013 hPa) was determined in a reliable study conducted according to an appropriate test protocol.
Reference
Result
The DSC measurements were performed twice. After cooling to -150/-50 °C at a rate of 2 K/min the sample was heated to +35 °C at a rate of 10 K/min. The cooling curve exhibits a sharp exothermic peak with a peak maximum at 15 °C (most likely crystallization). Additionally two weak exothermic maxima at 0 °C and -25/-26 °C are registered (crystallization or other phase transitions). Upon heating the heat flow curve shows a sharp endothermic peak with a peak maximum temperature at 19 °C and an extrapolated onset temperature of 14 °C (melting of main phase). This maximum is preceded by two smaller endothermic maxima at -23 °C and 2/3 °C
(phase transitions which cannot be clearly assigned to melting).
Melting temperature:
No standard melting point was found. The melting point of the main phase is detected at approx. 14 °C.
Description of key information
Trimethoxyoctadecylsilane: No standard melting point. Melting of the main phase at approximately 14 °C, at 1013 hPa (measured)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 14 °C
Additional information
No standard melting point was found. A melting of the main phase at approximately 14 °C (1013 hPa) was determined by Differential Scanning Calorimetry method according to EU Method A.1.
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