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Boiling point

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boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
according to guideline
EU Method A.2 (Boiling Temperature)
GLP compliance:
yes (incl. QA statement)
Type of method:
method according to Siwoloboff
Key result
Boiling pt.:
126.5 °C
Atm. press.:
101.5 kPa
Remarks on result:
other: The boiling point temperature was corrected due to barometric pressure to 126.4 °C

In run 1 the sample discoloured to yellow at 135°C, in run 2 discolouration was observed at 130.2°C.

The boiling point observed in this test is unexpectedly low in comparison with the melting range determined as part of EC Test A.1 (IUCLID section 4.2).

It is suspected that this may be due to the fact that the test material is a mixture. The components of the test material may have influenced the melting point and boiling point reversely. The components with higher melting points (longer chain lengths) may have a greater influence on the melting point whilst the components with a lower boiling point (shorter chain length) may have had a greater influence on the boiling point. Therefore the composition of the test material must be taken into consideration when interpreting the results.

The boiling point under atmospheric pressure was reported to be 126.4°C.

Description of key information

The boiling point of amides, C12-18 (even numbered), N-[3-(dimethylamino)propyl], N'-oxides was determined to be 126.4°C at atmospheric pressure in a GLP study according to EU method A.2 (Younis, 2013).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
126.4 °C

Additional information

The measured boiling temperature (126.4 °C) was obtained at 101.5 kPa and corrected to standard atmospheric pressure.