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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:
from 2017-03-23 to 2017-06-12
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Boiling pt.:
300.2 °C
Atm. press.:
1 013.3 hPa

Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect in the temperature range of 285 - 320 °C. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %.

Table 1: Boiling point (DSC measurement)

Test item / mg

Starting temperature / °C

Final test temperature / °C

Temperature range (endothermal) / °C

Onset (boiling) / °C

Crucible

Observations after the measurement

13.29

25

500

290 - 310

299.9

Aluminium with a hole

Mass loss: 100 %

12.76

25

350

285 - 320

300.6

Aluminium with a hole

Mass loss: 100 %

For the correction t of the boiling point to standard atmospheric pressure (1013.3 hPa) the equation, table and graphs of H.B. Hass and R.F. Newton in "CRC Handbook of Chemistry and Physics, 74th ed. 1993-1994", pages 15-16 and 15-17 were used:

t = (273.15 + t) • (3.0057 - log p) / Φ + 0.15 • (3.0057 - log p)

t: Temperature in °C

p: pressure in hPa

For the estimation of Φ the test item was classified in group 2 (hydrocarbons) according to the table of H.B Hass and R.F. Newton.

Table 2. Correction of the boiling point to standard atmospheric pressure

Onset (boiling) / °C

Ambient pressure / hPa

Φ(Group 2)

∆t / °C

Boiling point at 1013.3 hPa

299.9

1008.9

5.159

0.21

300.15

300.6

1018.2

5.160

-0.24

300.32

The test item had a mean boiling point at atmospheric pressure (1013.3 hPa) of 300.2 °C.

Conclusions:
The boiling point of the test item was determined to be 300.2 °C at 1013.3 hPa.
Executive summary:

A study was conducted according to OECD TG 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 12 – 13 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a liquid at ambient conditions. The starting temperature for both tests was 25 °C. In the first test the temperature was increased up to 500 °C at a constant heating rate of 10 K/min and in the second to 350 °C. Between approx. 285 – 320 °C an endothermic effect (boiling) was detected. The correction of the boiling temperature to standard pressure was performed according to H.N. Hass and R.F. Newton. The test item boiling point was determined to be 300.2 °C. No further thermal effects were observed up to the maximum test temperature of 500 °C.

Description of key information

The boiling point of the test item was determined to be 300.2 °C at 1013.3 hPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
300.2 °C

Additional information

A study (reference 4.3-1) was conducted according to OECD TG 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 12 – 13 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a liquid at ambient conditions. The starting temperature for both tests was 25 °C. In the first test the temperature was increased up to 500 °C at a constant heating rate of 10 K/min and in the second to 350 °C. Between approx. 285 – 320 °C an endothermic effect (boiling) was detected. The correction of the boiling temperature to standard pressure was performed according to H.N. Hass and R.F. Newton. The test item boiling point was determined to be 300.2 °C. No further thermal effects were observed up to the maximum test temperature of 500 °C.