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Diss Factsheets

Physical & Chemical properties

Boiling point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-12-03 to 2016-02-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
192.4 °C
Atm. press.:
1 013 hPa
Decomposition:
no

Preliminary thermogravimetric measurement

A preliminary thermogravimetric measurement was performed over a temperature range from room temperature to ca. 600°C. Beginning at room temperature the mass loss rate increased steadily, reaching a maximum at 150°C. At approx. 160°C the mass loss was practically complete, considering the initial mass loss from purging (ca. 0.5 %) before the start of the measurement. Until 600°C there was no residue left (TGA curve attached).

DSC measurements

The heat flow curve shows two sharp endothermic peaks. One with a peak maximum temperature at -19°C and an extrapolated onset temperature of -21°C, indicating the melting temperature. The other with a peak maximum temperature at 197°C and an extrapolated onset temperature of 192/193°C, indicating the boiling temperature at ambient pressure. Reweighing after the measurement the sample had lost approx. 99 % of its mass. (DSC curve attached).

The boiling temperature was determined from the extrapolated onset temperature of the endothermic peak. Since the ambient pressure deviates from the standard pressure, the measured boiling temperatures T were converted to normal boiling points Tn by means of the Sidney-Young equation.

Tn = T + (fT X Δp); fT = 0.038 K/hPa

Table of results:

 

extrapolated onset

temperature [°C]

boiling temperature [°C] at

1013 hPa

first run

192.23

192.19

second run

192.65

192.61

mean value

-

192.4

 

Conclusions:
A boiling point value of 192.4°C at 1013 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Boiling point: 192.4°C at 1013 hPa (OECD 103)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
192.4 °C

Additional information

A boiling point value of 192.4°C at 1013 hPa was determined for the substance using a Differential Scanning Calorimetry (DSC) in accordance with OECD Test Guideline 103 and in compliance with a known quality system (ISO 17025). The result is considered to be reliable and is selected as key study.

In a secondary source to which reliability could not be assigned, a boiling point value of 194°C was reported for the substance; no information on atmospheric pressure was stated.