Registration Dossier
Registration Dossier
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EC number: 269-923-6 | CAS number: 68391-04-8 This substance is identified by SDA Substance Name: C12-C18 alkyl dimethyl amine and SDA Reporting Number: 16-040-00.
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:
- 13 December 2011-28 March 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- According to OECD Guideline 102
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Principles of method if other than guideline:
- DSC and additional pour point determination
- Type of method:
- thermal analysis
- Remarks:
- Differential scanning calorimetry.
- Melting / freezing pt.:
- -3 °C
- Atm. press.:
- 1 013 hPa
- Conclusions:
- The melting point of the test substance is -3 ± 3 °C.
- Executive summary:
The melting point of the test substance was determined according to the OECD Guideline 102 using differential scanning calorimetry. In addition, a pour point determination was performed, resulting in a melting point of -3 +/- 3 °C.
Reference
DSC Method
The sample shows an endothermic melting peak in the -22 to +4 °C region.
Individual values:
Measurement Onset Peak
#1 -18.3 °C -11.5 °C
#2 -18.3 °C -11.5 °C
As the peak is broad and asymmetric, the DSC measurement does not give a well-defined melting point.
Pour point determination
Temperature |
Tube #1 |
Tube #2 |
-8 °C |
white solid |
white solid |
-6 °C |
white solid |
white solid |
-4 °C |
translucent solid |
translucent solid |
-3 °C |
liquid + solid |
liquid + solid |
-2 °C |
liquid |
liquid |
The lowest temperature at which the sample flows is -3 °C.
Based on experience with the method and the recommendation in the Guideline, the uncertainty is taken as ± 3 °C.
This result describes the macroscopic melting point. However, from the point of view of the internal structure of the sample, the melting takes place over a larger temperature range.
Description of key information
The melting point of the test substance is -3 ± 3 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -3 °C
Additional information
The melting point of the test substance was determined according to the OECD Guideline 102 using differential scanning calorimetry. In addition, a pour point determination was performed, resulting in a melting point of -3 +/- 3 °C.
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