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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18 March 1993
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
84/449/EEC
Deviations:
no
GLP compliance:
yes
Type of method:
hot stages
Key result
Melting / freezing pt.:
> 300 °C
Remarks on result:
not determinable

Linear Calibration substances

Substance

Melting-point

Lit. [⁰C]

Exp. [⁰C]

Azobenzene

68

67.7

Phenacetin

134.5

134.6

Phenolyphthalein

263

260 – 263.5

Conclusions:
The melting point of the substance is > 300 °C.
Executive summary:

The melting point was determined according to EEC-Guideline:84/449/EEC Part A.1. using the hot stage microscope (Mettler FP 52), a controller unit (Mettler FP 5) and an optical microscope (Peichert). The study was conducted in compliance with GLP.


 


A melting point could not be determined in this study, as the melting point of the substance is > 300 °C.


 

Description of key information

The melting point of the substance is > 300 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
350 °C

Additional information

The melting point was determined according to EEC-Guideline:84/449/EEC Part A.1. using the hot stage microscope (Mettler FP 52), a controller unit (Mettler FP 5) and an optical microscope (Peichert). The study was conducted in compliance with GLP.


 


A melting point could not be determined in this study, as the melting point of the substance is > 300 °C.


 


Calculation of the melting point by EpiSuite as contained in the OECD QSAR Toolbox led to a "Selected Melting Point" of 350°C.