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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:
08-Jul-2015 to 17-Sep-2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
GLP guideline study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point/Boiling Range)
GLP compliance:
yes (incl. certificate)
Remarks:
Hess. Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Type of method:
differential scanning calorimetry
Key result
Atm. press.:
ca. 1 004 hPa
Decomposition:
yes
Decomp. temp.:
ca. 140 °C
Remarks on result:
other:
Remarks:
. The test item has no boiling up to its decomposition starting at a temperature of about 140 °C.

Results of the DSC-measurements

In the temperature range of -40 to -10 °C, a very small endothermic effect with an energy of <10 J/g was observed. In the temperature range of 140 – 350 °C an exothermic effect could be detected, with an average decomposition energy of approximately -340 J/g, directly followed by a second exothermic effect in the temperature range of 350 – 450 °C, with an average decomposition energy of approximately -250 J/g.

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN9175

19.10

-34.21

-

-

-40 to -20 (endo)

160 to 350 (exo)

350 – 450 (exo)

18.04

1004.2

PN9176

12.42

-35.06

-

-

-40 to -10 (endo)

140 to 350 (exo)

350 – 430 (exo)

11.76

1004.2

 

The endothermic effects which could be observed during the heating phase are very small and do not represent the melting of the test item.

For a verification of the appearance of the test item at approximately -30 °C, a sample of the test item was placed in a freezer at a temperature of -24.8 °C and checked with a spatula after one day. After one day at -24.8 °C the test item appeared as a rubber like sticky mass. It was not solidified.

According to the DSC measurements and the visual verification in the freezer, the test item has The test item showed only a slight solidification. The test item has no boiling up to its decomposition starting at a temperature of about 140 °C.

Description of key information

No boiling point up to its decomposition at ca. 140 °C at 1004 hPa (OECD 103, A.2.).

Key value for chemical safety assessment

Additional information

The test item decomposes before reaching its boiling point and has no boiling point up to the decomposition temperature of approximately 140 °C as determined by differential scanning calorimetry.