1-(N,N-bis(2-ethylhexyl)aminomethyl)-1,2,4-triazole

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1986

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

Using the thermobalance method Instead of the gas saturation method

Principles of method if other than guideline:

The thermobalance method has been developed (see B.F. Rordorf, A. Geoffroy, M. Szelagiewicz, and E. Marti, "Vapour Pressure Methods for Industrial Applications" in Thermal Analysis, Proc. 6th Int. Conf. Therm. Anal. Vol. I, ed. H.G. Wiedemann, Birkhauser, Basel, 1980, p. 313)

The validity of the thermobalance method was tested with benzoic acid. The agreement with literature was extremely good (e.g. OECD Guideline No. 104, p. 4 )

GLP compliance:

yes

Type of method:

effusion method: vapour pressure balance

Remarks:

Thermogravimetry

Key result

Test no.:

#1

Temp.:

109 °C

Vapour pressure:

11 Pa

Remarks on result:

other: measured

Key result

Test no.:

#2

Temp.:

25 °C

Vapour pressure:

0.007 Pa

Remarks on result:

other: extrapolated

Heat of evaporation: 82.9 kJ/mol

Volatiles in temperature region 25°C to 94°C = 0.3%

Conclusions:

The vapour pressure of the test substance was extrapolated to be 0.0071 Pa at 25°C

Description of key information

Extrapolated vapour pressure = 0.0071 Pa at 25°C based on experimental value of 11 Pa at 109°C

Key value for chemical safety assessment

Vapour pressure:

0.007 Pa

at the temperature of:

25 °C

Additional information

The vapour pressure was measured by thermogravimetry (diffusion controlled evaporation)