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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
June - August 2000
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Key result
Atm. press.:
1 013.3 hPa
Decomposition:
yes
Decomp. temp.:
>= 190 °C

Boiling point / boiling range

The measurements show an endothermic effect (melting) in the range 60 - 80 °C, with an onset of 65 °C, a small endothermic effect at a temperature of ca. 160 °C (probable the transition of the liquid crystalline to the isotropic phase) and an exothermal effect, beginning at 190 °C. The small endothermic effect at approx. 160 °C has an energy of at least one order of magnitude below the melting enthalpy. Therefore it is concluded that this effect is not associated with the boiling of the test substance. The substance decompose at 190 °C.

Conclusions:
The test item has no boiling point up to the decompostion temperature at 190 °C .
Executive summary:

A study was conducted according to OECD test guideline 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using Differential Scanning Calorimetry (DSC). The determination was carried out in standard aluminium pan with a small hole. The measurements show an endothermic effect (melting) in the range 60 - 80 °C, with an onset of 65 °C, a small endothermic effect at a temperature of ca. 160 °C (probable the transition of the liquid crystalline to the isotropic phase) and an exothermal effect, beginning at 190 °C. Thus, it was concluded that the substance has no boiling point up to the decompostion temperature at 190 °C .

Description of key information

The test item has no boiling point up to the decompostion temperature at 190 °C .

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
190 °C

Additional information

A study was conducted according to OECD test guideline 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using Differential Scanning Calorimetry (DSC). The determination was carried out in standard aluminium pan with a small hole. The measurements show an endothermic effect (melting) in the range 60 - 80 °C, with an onset of 65 °C, a small endothermic effect at a temperature of ca. 160 °C (probable the transition of the liquid crystalline to the isotropic phase) and an exothermal effect, beginning at 190 °C. Thus, it was concluded that the substance has no boiling point up to the decompostion temperature at 190 °C .