4,4'-oxydianiline

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

08 February 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Principles of method if other than guideline:

The measuring principle is equivalent to ASTM D2879-86 (isoteniscope principle) but with only 1 ml sample volume.

GLP compliance:

yes (incl. QA statement)

Type of method:

isoteniscope

Specific details on test material used for the study:

4,4'-oxydianiline
4,4'-diaminodiphenyl ether
CAS 101-80-4

Key result

Temp.:

20 °C

Vapour pressure:

0.09 kPa

Key result

Temp.:

25 °C

Vapour pressure:

0.13 kPa

Transition / decomposition:

no

Table 1. Vapour pressure of water at various temperatures

 

Temperature °C	Literature Data kPa	Measured Data kPa	Deviation %
20	2.34	2.25	4
25	3.17	3.16	0
30	4.24	4.30	1
35	5.62	5.68	1
40	7.38	7.46	1
45	9.58	9.73	2
50	12.33	12.56	2
55	15.74	16.06	2
60	19.92	20.62	4
65	25.00	26.23	5
70	31.16	33.23	7
75	38.54	41.79	8
80	47.34	52.26	10

 

 

Table 2. Vapour pressure of 4,4-Diaminodiphenylether at various temperatures

 

Temperature °C	Vapour pressure 1 kPa	Vapour pressure 2 kPa	Mean kPa
20	-0.09	-0.09	-0.09
25	-0.01	-0.01	-0.01
30	0.07	0.07	0.07
35	0.18	0.18	0.18
40	0.33	0.33	0.33
45	0.49	0.50	0.50
50	0.70	0.72	0.71
55	0.89	0.92	0.91
60	1.26	1.31	1.29
65	1.76	1.81	1.79
70	2.34	2.41	2.38
75	3.13	3.22	3.18
80	4.01	4.11	4.06
85	5.07	5.20	5.14
90	6.35	6.52	6.44
95	7.92	8.16	8.04
100	9.55	9.84	9.70

Conclusions:

The substance is of extremely low volatility at room temperature.

Executive summary:

The substance is of extremely low volatility at room temperature.

Description of key information

The vapour pressure of the substance 4,4'-Oxydianiline was determined according to the OECD Guideline 104, under GLP conditions.

Based on the simplified Clausius-Clapeyron equation a regression line was fitted on the measured data and the vapour pressure was extrapolated for 20 and 25 °C:

20 °C 0.09 kPa

25 °C 0.13 kPa

On the basis of these results, the volatility of the test item is considered extremely low at room temperature

Key value for chemical safety assessment

Vapour pressure:

0.09 kPa

at the temperature of:

20 °C