Registration Dossier
Registration Dossier
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EC number: 268-220-1 | CAS number: 68037-96-7 This substance is identified by SDA Substance Name: C16-C18 and C18 unsaturated alkyl dimethyl amine and SDA Reporting Number: 11-040-00.
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 13 December 2011-3 April 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: According to OECD Guideline 102
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
- Report date:
- 2012
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Type of method:
- thermal analysis
- Remarks:
- Differential scanning calorimetry.
Test material
- Reference substance name:
- Amines, (C16-18 and C18-unsatd. alkyl)dimethyl
- EC Number:
- 268-220-1
- EC Name:
- Amines, (C16-18 and C18-unsatd. alkyl)dimethyl
- Cas Number:
- 68037-96-7
- Molecular formula:
- R-N(Me)2, whereas R= C16-18-alkyl (even numbered, unbranched, saturated and C18 unsaturated)
- IUPAC Name:
- N,N-dimethyl-C16-18-(even numbered, C18 unsaturated)-alkyl-1-amines
Constituent 1
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- -10 °C
- Atm. press.:
- 1 013 hPa
Any other information on results incl. tables
The sample shows a broad endothermic melting peak in the -20 to +10 °C region. There is also an endothermic peak in the -55 to -40 °C region.
Individual values:
Measurement Onset Peak
#1 -9.7 °C 4.7 °C
#2 -9.7 °C 4.4 °C
The mean onset (rounded to -10 °C) is selected as giving the best value of the melting point. The difference between the lower onset value and the higher peak value is used to estimate the uncertainty.
The test substance was thermostatted at -20°C for 15 minutes. Under these conditions it is a white solid with crystalline appearance. This confirms that the endothermic peak in the -55 to -40 °C region does not correspond to a macroscopic melting process. The physical processes responsible for the low temperature peak have not been determined.
Applicant's summary and conclusion
- Conclusions:
- The melting point of the test substance is -10 ± 7 °C.
- Executive summary:
The melting point of the test substance was determined according to the OECD Guideline 102 using differential scanning calorimetry. At 1013 hPa, the melting point is -10 +/- 7 °C.
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