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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:
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
yes
Type of method:
thermal analysis
Remarks:
DTA, additionally a thermogravimetry was performed.
Remarks on result:
other: no melting point detectable

No melting point is detectable for the test substance. The measured endothermic effects at 60 °C - 125 °C are caused by the elimination of crystal water.

In the thermogravimetry test with heating rate 10 K/min in the range 30 °C to 300 °C a mass loss of 26.4% was detected which equals 3.3 mol crystal water. (1. step 30 °C - 97 °C: 5.3%, 2. step 97 °C - 191 °C: 21.1%).

Executive summary:

In a differential thermal analysis study according EU Method A.1 no melting point was detectable for the sodium p-chloro-m-cresolate (hydrated form). The measured endothermic effects at 60 °C - 125 °C are caused by the elimination of crystal water.

In a thermogravimetry test a mass loss of 26.4% was detected which equals 3.3 mol crystal water.

Description of key information

no melting point detectable in DTA

endothermic effects at 60 °C - 125 °C

(EU Test A.1)

Key value for chemical safety assessment

Additional information