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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:
2017-09-21 to 2018-02-14
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
GLP compliance:
no
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Key result
Atm. press.:
1 013.3 hPa
Decomposition:
yes
Decomp. temp.:
ca. 150 °C

Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 145 - 235 °C. The melting temperature of 119 - 123 °C is known from the safety data sheet. No further endothermic effects were observed up to the final temperature (500 °C) but exothermic effects occurred above 300 °C. The mass loss amounted to 50% after the first DSC measurement and 14% after the second measurement. The second measurement was terminated at 260 °C to ensure that the endothermal efffect is the melting effect.

Table 1: Results of the DSC measurements

 Test item / mg  Starting temperature / °C  Final test temperature / °C  Temperature range (endothermal) / °C  Onset (boiling) / °C  Crucible  Observations after the measurement
10.22   25  500  150 - 235  -  Aluminium with a hole  Black solid, 50% mass loss
 9.58  25  260  145 - 235  -  Aluminium with a hole  Dark red, solidified melt, 14% mass loss

The test item had no boiling point at atmospheric pressure. Decomposition started above the melting point at approximately 150 °C.

Conclusions:
The test item had no boiling point at atmospheric pressure. Decomposition started above the melting point at approximately 150 °C.
Executive summary:

The boiling point / boiling range of the test item was investigated by DSC measurement according to OECD 103. The study showed that the test item starts to decompose at a temperature of approx. 150 °C. No boiling point could be determined before the decomposition. The test item has no boiling point under atmospheric conditions.

Description of key information

The boiling point / boiling range of the test item was investigated by DSC measurement according to OECD 103. The study showed that the test item starts to decompose at a temperature of approx. 150 °C. No boiling point could be determined before the decomposition. The test item 4,4’-Dimethoxytrityl chloride has no boiling point under atmospheric conditions.

Key value for chemical safety assessment

Additional information