Sodium 2-biphenylate

Melting point / freezing point

Link to relevant study record(s)

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

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Remarks:

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 53 °C - 60 °C are caused by the elimination of crystal water. With polarized light under a melting point microscope nor melting or change in modification could be observed.

In the thermogravimetry test with heating rate 10 K/min up to 300 °C a mass loss of 24.9 % was detected which equals 3.7 mol crystal water (theoretical value: 27.2 % equals 4 mol crystal water).

Description of key information

no melting point detectable in DTA

endothermic effects at 53 °C - 60 °C

(EU Method A.1)

Additional information

In a DTA according to EU Method A.1 no melting point was detactable for sodium 2-biphenylate (hydrated form). The measured endothermic effects at 53 °C to 60 °C are caused by elimination of crystal water. With polarized light under a melting point microscope nor melting or change in modification could be observed.