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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:
1999-06-14 to 1999-08-07
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to an internationally recognised method, and under GLP. Purity and isomers composition are available from the notifier. Therefore full validation applies.
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Qualifier:
according to
Guideline:
other: ASTM E537-86
GLP compliance:
yes (incl. certificate)
Remarks:
UK GLP compliance programme (inspected on 23rd March 1998/ signed on 21st July 1998)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Storage condition of test material: room temperature, in the dark, under nitrogen.
Key result
Boiling pt.:
572 K
Atm. press.:
100.7 kPa
Remarks on result:
other: +/- 1 K

An endotherm, interpreted as the boiling temperature, was observed at 298.0°C (571.2 K) under 100.78 kPa, and 299.5°C (572.7 K) under 100.63 kPa, respectively for determinations 1 and 2.

Thermographic data acquired in an air atmosphere showed an exotherm formed prior to boiling. This was significantly reduced by use of a nitrogen atmosphere, indicating that the test item undergoes primarily oxidative decomposition.

Executive summary:

The boiling range of the test substance was measured under GLP according to ASTM E537-86, DSC method (listed in EU A2 guideline).

The result retained was the mean of the two runs.

The boiling point of the test substance is 298.8°C under nitrogen. The substance undergoes primarily oxidative decomposition in air.

Description of key information

Boiling point = 298.8°C (under 100.7 kPa and nitrogen atmosphere)

The substance undergoes primarily oxidative decomposition in air.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
298.8 °C

Additional information

A fully reliable experimental study, conducted according to a recognized EC method and under GLP, is available. Therefore, it is considered as a key study, and the result is retained as key value for purpose of CSA.