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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:
10 July 2017 - 19 January 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
Regulation (EC) 440/2008 of 30 May 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
July 1995
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
>= 160 - <= 410 °C
Atm. press.:
>= 996 - <= 997 hPa
Decomposition:
no
Remarks on result:
other: Range determined on the basis of two measurements.
Remarks:
A range rather than a mean is reported because the measured values deviated by more than 0.5 K.

Table 2:          Results of the DSC-measurements

No.

Sample weight (mg)

Onset of Effect (°C)

Range of effect (°C)*

Weight loss (mg)

Atmospheric pressure (hPa)

PN13868

8.32

248.91

160 to 410 (endo)

7.90

996.9

PN13873

15.35

248.63

160 to 410 (endo)

14.79

996.1

*positive heat flow for exothermic processes, negative heat flow for endothermic processes

 

To verify the results of the DSC measurement, an additional measurement with the test tube method was performed in the temperature range of 23.1 – 233.4 °C. Therefore, 8.12 g of the test item was heated up by a lighter. The observations during the test with the test tube method are summarized in Table 3.

 

Table 3:          Observations during the test with the test tube

Temperature

Observation

Start (23.1 °C)

High viscous yellow liquid

89.3 °C

Test item changes colour from yellow to brown

163.2 °C

Small bubbles slowly rise in the test item

188.9 °C

Test item boils and evaporates as withe fog, Apperance: dark brown liquid

233.4 °C

Stop of measurement

 

According to the observations during the test with the test tube method, the endothermic effect in the temperature range of 160 – 410°C in the DSC measurements can be assigned to a boiling of the test item.

Conclusions:
The boiling point range of the test item was determined to be: 160 °C- 410 °C.
Executive summary:

EU Method A.2. – The boiling point of the test item was determined using differential scanning calorimetry.  The procedure employed was designed to be compatible with Method A.2. Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Aliquots of test item (0.0083 - 0.0154 g) were placed in crucibles and subjected to a thermal program from -100 °C to 500 °C.  Cooling at a constant rate of 0.25 K/min was followed by a waiting period of 30 minutes at -100 °C and heating at a constant rate of 10 K/min to 500 °C.  Two determinations were carried out.  Both determinations were conducted under an inert atmosphere.  

A boiling point range of 160.0 °C – 410.0 °C for the test item was determined at atmospheric pressure (996 – 997 hPa).

Description of key information

Boiling Point Range: 160 °C - 410 °C (683.15 - 273.15 K) at 996 - 997 hPa; EU Method A.2.; S Seitz (2017)

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
160 °C

Additional information

EU Method A.2. – The boiling point of the test item was determined using differential scanning calorimetry.  The procedure employed was designed to be compatible with Method A.2. Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Aliquots of test item (0.0083 - 0.0154 g) were placed in crucibles and subjected to a thermal program from -100 °C to 500 °C.  Cooling at a constant rate of 0.25 K/min was followed by a waiting period of 30 minutes at -100 °C and heating at a constant rate of 10 K/min to 500 °C.  Two determinations were carried out.  Both determinations were conducted under an inert atmosphere.  

A boiling point range of 160.0 °C – 410.0 °C for the test item was determined at atmospheric pressure (996 – 997 hPa).