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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:
25 November 2012 to 9 January 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
other: reference to Antoine equation
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
1995
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
distillation method
Key result
Boiling pt.:
77 °C
Atm. press.:
0.27 kPa
Boiling pt.:
ca. 222 °C
Atm. press.:
101.325 kPa
Decomposition:
yes
Decomp. temp.:
200 °C
Remarks on result:
other: estimated boiling point.
Remarks:
The test substance showed signs of decomposition from 200 °C at atmospheric pressure. The Antoine equation was used to estimated the boiling point at atmospheric pressure.

Summary of Test results

 

Boiling point of the test substance at atmospheric pressure (101.5 kPa)

Sample name

Item

Run

Temperature

Remarks

Pressure

[test substance]

Boiling point

1

Not Determined

(not distilled below

200 °C (473 K))

Decomposed

from 200 °C

(473 K)

101.5 kPa

2

Not Determined

(not distilled below

200 °C (473 K))

Decomposed

from 200 °C

(473 K)

101.5 kPa

Note) Temperature in Kelvin (K) = Temperature in °C + 273.15

 

In the vapour pressure test, the Antoine equation was determined. This equation can be used to estimate the boiling point of the substance by calculating the temperature at which the vapour pressure equals the atmospheric pressure as follows:

 

log p = A+ B/T ==> T = B / (log p - A)

A= 11.28

B= -3108.50

P= 101500 Pa

 

Calculated T

= 222.34°C(495.49 K)

 

Boiling point result at reduced pressure ( 0.27 kPa)

Sample name

Item

Run

Temperature

Pressure

[test substance]

Boiling point

1

77 °C (350 K)

0.27 kPa

2

77 °C (350 K)

0.27 kPa

Note) Temperature in Kelvin (K) = Temperature in°C+ 273.15

 

Conclusions

The boiling point was measured using a general distillation apparatus at atmospheric pressure and reduced pressure. The test substance was not distilled below 200 °C (473 K), with visible signs of decomposition from 200 °C (473 K) at atmospheric pressure. According to Antoine equation the substance should have a boiling point close to 222 °C.

The boiling point of the test substance was determined to be 77 °C (350 K) at reduced pressure (0.27 kPa) with no reaction and/or decomposition.

Conclusions:
A boiling point value of 77 °C (at 0.27 kPa) was determined for the test substance according to OECD Guideline 103.

Description of key information

Boiling point: 77 °C at 0.27 kPa (OECD Guideline 103, distillation method)

Key value for chemical safety assessment

Additional information

The test substance showed signs of decomposition from 200 °C at atmospheric pressure.

The Antoine equation was used to estimated the boiling point at atmospheric pressure: ca. 222 °C.

The vapour pressure was experimentally determined at reduced pressure (0.27 kPa).