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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:
2005-10-28 to 2006-03-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
1995
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Key result
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
350 °C
Remarks on result:
other: melting/endothermic reaction started at 40 °C, but not completed, thus, no boiling point can be established

Boiling Point / Boiling Range

The DSC-measurements in aluminium crucibles with a hole showed four endothermic effects in the temperature ranges 45 - 65 °C, 100 - 110°C, 150 - 185 °C and 280 - 290 °C and an exothermal decomposition beginning at a temperature of approximately 350 °C.

To verify the result of the DSC-measurement an additional measurement with the capillary method were performed:

No.

Set point

Heating rate

End point

Boiling point

Remarks

1

40 °C

20K/min

380 °C

-

105 °C: melting, turbid melt

178 °C: clear melt

No change up to 380 °C

1

380 °C

5K/min

410 °C

-

No change of the clear melt, no boiling

 

The test item has no boiling point at atmospheric pressure. The test substance decomposes at approximately 350 °C before the boiling point is reached.

Conclusions:
The test item has no boiling point at atmospheric pressure. The test substance decomposes at approximately 350 °C before the boiling point is reached.
Executive summary:

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item. First the differential scanning calorimetry was used. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Four endothermic effects in the temperature ranges 45 - 65 °C, 100 - 110 °C, 150 - 185 °C and 280 - 290 °C and an exothermal decomposition beginning at a temperature of approximately 350 °C were determined.

To verify the result of the DSC-measurement an additional measurement with the capillary method were performed.

The boiling/endothermic reactions started at 40°C and was not complete until decompositon at 350 °C. Thus, no boiling point could be established.

Description of key information

The test item has no boiling point at atmospheric pressure. The test substance decomposes at approximately 350 °C before the boiling point is reached.

Key value for chemical safety assessment

Additional information

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item. First differential scanning calorimetry was used. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Four endothermic effects in the temperature ranges 45 - 65 °C, 100 - 110 °C, 150 - 185 °C and 280 - 290 °C and an exothermal decomposition beginning at a temperature of approximately 350 °C were determined.

To verify the result of the DSC-measurement an additional measurement with the capillary method were performed.

The boiling/endothermic reactions started at 40 °C and was not complete until decompositon at 350 °C. Thus, no boiling point could be established (reference 4.3-1)