Reaction mass of phenol and tetraphenylphosphonium phenolate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

GLP compliance:

no

Type of method:

effusion method: by loss of weight or by trapping vaporisate

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0.005 Pa

Test no.:

#2

Temp.:

25 °C

Vapour pressure:

0.013 Pa

Test no.:

#3

Temp.:

50 °C

Vapour pressure:

0.535 Pa

Test no.:

#4

Temp.:

55 °C

Vapour pressure:

1.06 Pa

Areas and transmission probability factors of the effusion orifices:

Cell	length of the effusion orifice [mm]	Area of the effusion orifice [mm2]	transmission probability factor
1	0.0125	0.777	0.991
2	0.0125	0.774	0.991
3	0.0125	0.779	0.991

Measured results:

Cell	T [°C]	t [s]	m [mg]	p [Pa]
1	25.15	21338	1.55	1.49E-02
2	25.15	21338	1.10	1.07E-02
3	25.15	21338	1.38	1.33E-02
1	25.06	63461	4.38	1.42E-02
2	25.06	63461	3.79	1.23E-02
3	25.06	63461	3.91	1.27E-02
1	35.02	10958	2.77	5.29E-02
2	35.02	10958	3.02	5.79E-02
3	35.02	10958	3.43	6.53E-02
1	44.84	5133	6.09	2.52E-01
2	44.84	5133	7.22	3.00E-01
3	44.84	5133	5.90	2.44E-01

 

Conclusions:

Based on the measured results, the vapour pressure of the test item was calculated to be 5.52 x 10^-3 Pa at 20 °C and 5.35 x 10^-1 Pa at 50 °C.

Executive summary:

The vapour pressure of the test item was measured using the Knudsen effusion method (mass loss technique), according to the guidelines OECD 104 / EU A.4. The quality of the apparatus was previously verified with the measurement of well-known reference compounds. Experiments were performed at three temperatures between 25 °C and 45 °C. Based on the results, the vapour pressure of the test item was calculated to be 5.52 x 10^-3 Pa at 20 °C and 5.35 x 10^-1 Pa at 50 °C.

Description of key information

The vapour pressure of the test item was measured using the Knudsen effusion method (mass loss technique), according to the guidelines OECD 104 / EU A.4. The quality of the apparatus was previously verified with the measurement of well-known reference compounds. Experiments were performed at three temperatures between 25 °C and 45 °C. Based on the results, the vapour pressure of the test item was calculated to be 5.52 x 10^-3 Pa at 20 °C and 5.35 x 10^-1 Pa at 50 °C.

Key value for chemical safety assessment

Vapour pressure:

0.006 Pa

at the temperature of:

20 °C