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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:
2013-09-11 to 2013-02-07
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Version / remarks:
adopted 2 Jul 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
dated 31. May 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Version / remarks:
dated Aug. 1996
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method according to Siwoloboff
Key result
Boiling pt.:
245.5 °C
Atm. press.:
992.01 hPa
Decomposition:
yes

The test item was homogenised in the drying chamber at 50 °C.

In a first approach, a pre-test and two main tests were conducted using batch I1201513. In these experiments, bubbles were observed during heating, but the chain of bubbles didn’t break down. This was considered to be caused by hydrolysis of the test item during storage. Therefore, the test was repeated with the new batch I1300023.

 

Pre-Test

A small amount of the test item in a test tube was heated in an aluminium block with a heating plate. Boiling was observed at 250 °C. The bubble chain broke at 168 °C and the test item was amber coloured. After cooling down, the test item was orange-brown and turbid.

 

Main Test

The test item was filled into a sample tube containing a capillary tube in such a manner that the sealed part of the capillary was lying below the surface of the test item. The sample tube was filled with dry argon closed with a stopper. For the increase of the temperature, a temperature gradient of < 1 K/min was maintained. The determination was performed in duplicate.

The measured values of the second performance are stated in the following table:

Determination

Boiling Point

Atmospheric Pressure

First determination

245 °C (518.2 K)

99201 Pa

Second determination

246 °C (519.2 K)

99201 Pa

As the test item decomposes, a correction following Sidney-Young was not applied.

Conclusions:
The boiling point of the test item was determined to be 245.5 °C at 992.1 hPa under decomposition.
Executive summary:

A study was conducted according to OECD TG 103, Regulation (EC) 440/2008 method A.2 and OPPTS 830.7220 to determine the boiling point of the test item Incozol 4. Using the method according to Siwoloboff the determination of the boiling point was performed in duplicate under argon atmosphere. The boiling point at 992.1 hPa was determined to be 245.5 °C (519.6 K) under decomposition. This value is the mean of two independent determinations. As the test item decomposes, a correction following Sidney-Young was not applied. No observations were made which might cause doubts on the validity of the study outcome. Therefore, the result of the study is considered valid.

Description of key information

The boiling point of the test item was determined to be 245.5 °C at 992.1 hPa under decomposition.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
245.5 °C

Additional information

A study was conducted according to OECD TG 103, Regulation (EC) No 440/2008 method A.2 and OPPTS 830.7220 to determine the boiling point of the test item Incozol 4. Using the method according to Siwoloboff the determination of the boiling point was performed in duplicate under argon atmosphere. The boiling point at 992.1 hPa was determined to be 245.5 °C (519.6 K) under decomposition. This value is the mean of two independent determinations. As the test item decomposes, a correction following Sidney-Young was not applied. No observations were made which might cause doubts on the validity of the study outcome. Therefore, the result of the study is considered valid.

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