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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
In accordance with EU A1 Regulation (EC) No 440/2008, Annex, Official Journal of the European Union L142/1, melting point was measured by the Differential Scanning Calorimetry method (OECD Guidelines for The Testing of Chemicals, 102, July 27 1995).
Deviations:
no
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
Specific details on test material used for the study:
Sample: The sample was dried under a nitrogen purge to remove water prior to analysis
Chemical Name: Cetyl Betaine
Physical State liquid (30% active ingredient)
CAS # 693-33-4
EU # 211-748-4
Manufacturer Colonial
Batch # / Lot # 53841K16
Received on November 22, 2016
Tested on February 1, 2017
Key result
Melting / freezing pt.:
>= 60.5 - <= 62.7 °C
Decomposition:
no
Sublimation:
no

A freezing point was not evident in the sample. A melting point with an average onset of 334.8°K

(61.6°C) was evident on heating. There was also a very small melting point at approximately 13°C in Replicate 1 however it did not reproduce well in Replicate 2. The end of the melt was noted at around 91°C

Conclusions:
A freezing point was not evident in the sample. A melting point with an average onset of 334.8°K
(61.6°C) was evident on heating. There was also a very small melting point at approximately 13°C in Replicate 1 however it did not reproduce well in Replicate 2.

Description of key information

DSC analysis of the material, which had been dried under nitrogen prior to analysis since it was presented as an aqueous liquid, showed a range melting temperatures. Melting occurred at 61.6°C and ended at around 91°C. A freezing point was not evident in the dried sample.

The average has been taken for this result.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
61.6 °C

Additional information