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Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
other: ASTM E 537, Standard method for assessing the thermal stability of chemicals by methods of differential thermal analysis.
GLP compliance:
Type of method:
differential scanning calorimetry
Melting / freezing pt.:
191 °C
Atm. press.:
ca. 1 atm

The DSC diagram shows two endothermic peaks. The first peak at about 170°C has an endothermic energy of about 8 J/g. Begause of this small energy this peak can ruled out as the the melting point. The second peak has an endothermic energy of about 72 J/g. This is in the range of melting energies. Individual results:

 No.  Sample mass (mg)  Melting Point (°C)
 1  12.0  191.0
 2  11.1  191.4
 3  12.8  191.2
 Mean    191.2
Executive summary:

The melting point using DSC was measured according to ASTM E 537.

Description of key information

The melting point of Solvent Violet 59 was approx. 191 °C and no pressure was reported.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
191 °C

Additional information