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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04.05-12.06.2006
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
Boiling pt.:
346 °C
Atm. press.:
ca. 1 013.25 hPa
Decomposition:
no

Thermal Stability

The DSC measurement in a closed glass crucible showed an endothermic effect (melting) in the temperature range 35 - 60 °C and no exothermic effect until 400 °C.

Boiling Point / Boiling Range (DSC)

Three measurements in aluminium crucibles with a hole showed an endothermic effect after the melting in the temperature range 310 - 350 °C with an onset temperature of approximately 346 °C.

Ident No. Onset / °C Temperature range / °C Crucible
23785 344.33 310 - 350 Aluminium with a hole
23788 345.82 310 - 350 Aluminium with a hole
 23790 346.23  310 - 350   Aluminium with a hole

For the correction of the boiling point to standard atmospheric pressure (1013.3 hPa) the equation, table and graphs of H.B. Hass and R.F. Newton in "CRC Handbook of Chemistry and Physics, 74th ed. 1993 -1994", pages 15 -16 and 15 -17 were used. The corrected values are shown in the table below:

 Ident.no.  Onset / °C  Atmospheric pressure / hPa  (group 2)  delta-t / °C  Boiling point at 1013.3 hPa / °C
 23785  344.33  1010  5.249  0.162  344.49
 23788  345.82  1010  5.252  0.163  345.98
 23790  346.23  1010  5.252  0.163  346.39
Conclusions:
The boiling point of the test item at atmospheric pressure (1013.3 hPa) is 346 °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. The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The test item had a boiling point of 346 °C under atmospheric conditions.

Description of key information

The test item had a boiling point of 346 °C under atmospheric conditions.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
346 °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. The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The test item had a boiling point of 346 °C under atmospheric conditions.

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