N,N-Bis-(4-biphenyl)amine

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

October 21-22,2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

no

Type of method:

effusion method: Knudsen cell

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0 Pa

Key result

Test no.:

#2

Temp.:

25 °C

Vapour pressure:

0 Pa

Test no.:

#3

Temp.:

50 °C

Vapour pressure:

0 Pa

Individual results

Before the vapour pressure measurement the test item was degased at 60 °C for 3 hours. The vapour pressure was measured in the temperature range of 60 °C to 120 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1. The test item looked unchanged after the measurement and no mass loss was determined after the measurement.

 

Measured vapour pressures and corresponding temperatures

Temperature / °C	Vapour pressure / hPa
60	*
70	*
80	*
90	*
100	*
110	*
120	2.3 x 10E-5

*: below the detection limit of 10E-5 hPa

 

Beside for the highest measurement temperature of 120 °C, the measured vapour pressures were below the detection limit of 1E-5 hPa.

Conclusions:

The vapour pressure of the test item at 25 °C was determined to be below 2E-6 Pa.

Executive summary:

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined in the temperature range 60 -120 °C. Since the vapour pressure measurements did not yield vapour pressures sufficiently high to extrapolate to20, 25 and 50 °C these values were estimated according to the Antoine equation. Based on the highest measured vapour pressure at 120 °C (vapour pressure: effusion method), the following upper limit vapour pressure values for the test item were calculated to be <1E-6Pa at 20 °C and <2E-6 Pa at 25 °C and <4E-5 Pa at 50 °C respectively.

Description of key information

The vapour pressure of the test item at 25 °C was determined to be below 2E-6 Pa.

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

25 °C

Additional information

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined in the temperature range 60 -120 °C. Since the vapour pressure measurements did not yield vapour pressures sufficiently high to extrapolate to20, 25 and 50 °C these values were estimated according to the Antoine equation. Based on the highest measured vapour pressure at 120 °C (vapour pressure: effusion method), the following upper limit vapour pressure values for the test item were calculated to be <1E-6Pa at 20 °C and <2E-6 Pa at 25 °C and <4E-5 Pa at 50 °C respectively.