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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:
December 2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Remarks:
Well conducted study under Internal management system and according to EC and OECD guidelines, certificate of analysis included in the report.
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
May 31, 2008
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
Adopted July 27, 1995
Deviations:
no
Qualifier:
according to
Guideline:
other: 4. ASTM E 537-07, Standard test method for the thermal stability of chemicals by Differential Scanning Calorimetry, October 1, 2007
Deviations:
no
Qualifier:
according to
Guideline:
other: 6. Calibration Method C-SR-054, Method for the calibration of the DSC822e module, November 13, 2003
Deviations:
no
GLP compliance:
no
Remarks:
Internal management system
Type of method:
thermal analysis
Melting / freezing pt.:
> 41.5 - < 51 °C

Accuracy check

Measured values for Indium:

The measured values are within the acceptance limits.

 

 

Test substance

The measured values for the test substance are mentioned below. The last column shows the mean values. The mean values for the initial and final melting temperature are rounded to the nearest 0.5°C.

 

 

Test 1

Test 2

Mean

Initial melting temperature [°C]

41.3

41.7

41.5*

Final melting temperature [°C]

51.0

51.4

51.0*

Enthalpy of melting [J/g]

95.3

96.2

95.8

        * mean of initial and final melting temperature is rounded to

          the nearest 0.5°C

 

The melting range of the test substance is 41.5°C to 51.0°C.

The enthalpy of melting is 95.8 J/g.

See the DSC curves in the attached files.

Conclusions:
The melting range of [1,3-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide is 41.5°C to 51.0°C.
Executive summary:

The melting range of [1,3-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide is 41.5°C to 51.0°C.

Description of key information

The melting range of [1,3-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide is 41.5°C to 51.0°C.

Key value for chemical safety assessment

Additional information

The outcome of the endpoint is supported by three publications.

This study shows that the substance is solid at room temperature.