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Boiling point

Link to relevant study record(s)

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 for cross-reference:

other: reference to Antoine equation

Qualifier:

according to guideline

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)

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).