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Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04 - 15 Aug 2011
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 102 (Melting point / Melting Range)
according to guideline
other: VTA(S)31x93001.02 (internal method)
GLP compliance:
Type of method:
thermal analysis
differential scanning calorimetry
Melting / freezing pt.:
>= -3 - <= 53 °C
Atm. press.:
ca. 1 013 hPa
Melting / freezing pt.:
43 °C
Atm. press.:
ca. 1 013 hPa
Remarks on result:
other: crystallisation

Test conducted under atmospheric pressure condition, decomposition/sublimation, as well as decomposition /sublimation temperature is not specified.

The test item shows an area of melting temperatures between -3 and 53 °C (melting of crystalline parts). The cooling run shows a crystallisation effect at 43 °C.

Up to 100 °C the sample shows no significant weight loss.

The sample was melted at 70 °C before measuring, the reason for melting is not clearly reported.

The additionally obtained boiling point with the DSC measurement is inconsistant with the boiling measurement due to the used open instead of the partially capsulated crucible, since the shown melting point is consistant.

Description of key information

-3 to 53°C at ca. 1013 hPa (OECD 102, DSC)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
47.9 °C

Additional information

The melting point of the substance was determined by Differential Scanning Calorimetry according to OECD Guideline 102. During heating, various endothermic effects were observed between -3 and 53 °C. All of these effects were attributed to the melting of th crystalline parts of the substance. The biggest effect was noticed at 47.9 °C, which will be used as key value for chemical safety assessment. During cooling down, a crystallization effect was observed at 43 °C.