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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
Study period:
November 3, 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Qualifier:
according to
Guideline:
other: OECD Guideline 103 (Boiling point)
Principles of method if other than guideline:
Analysis based on internal method SOP-STR 028.
GLP compliance:
no
Type of method:
differential scanning calorimetry
Remarks on result:
other: no melting point between 25 and 450 °C

DSC profile showed:

1. endothermic event between 32 and 152 °C (onset 32 °C, enthalpy -156 J/g)

2. exothermic event between 163 and 279 °C (onset 163 °C, enthalpy -190 J/g)

3. endothermic event between 306 and 354 °C (onset 320 °C, enthalpy -21 J/g)

Conclusions:
Melting point: 140°C
Executive summary:

Method

Differential scanning calorimetry analysis carried out between 25 and 450 °C, increasing temperature by 20 °C/min under N2.

Results

No melting point was seen.

DSC profile showed:

1. endothermic event between 140 and 152 °C (onset 140 °C, enthalpy -156 J/g)

2. exothermic event between 165 and 279 °C (onset 165 °C, enthalpy -190 J/g)

3. endothermic event between 306 and 354 °C (onset 320 °C, enthalpy -21 J/g)

Description of key information

140 °C;

Decomposition: 165 °C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
140 °C

Additional information

R&C DSC showed a Malachite Green 4 Acetate melting point at 140°C and a reaction of decomposition at 165°C.