Propanenitrile, 3-[[4-[[5,6(or 6,7)-dichloro-2-benzothiazolyl]azo]phenyl]ethylamino]-

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 19, 2021 - October 21, 2021

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

EC No. 761/2009

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

2006

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: vapour pressure balance

Key result

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0 Pa

Key result

Test no.:

#1

Temp.:

25 °C

Vapour pressure:

0 Pa

Key result

Test no.:

#1

Temp.:

50 °C

Vapour pressure:

0.001 Pa

Individual results:

The vapour pressure was measured in the temperature range of 40 °C to 120 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1. After the measurement a mass loss of approx. 6 % (w/w) was determined.

Table 1: Measured vapour pressures and corresponding temperatures

Temperature / °C	Vapour pressure / hPa
40	< 1 × 10^-5 *
50	1.8 × 10^-5
60	2.3 × 10^-5
70	3.1 × 10^-5
80	5.0 × 10^-5
90	9.2 × 10^-5
100	1.7 × 10^-4
110	2.8 × 10^-4
120	3.3 × 10^-4
90	1.4 × 10^-5

*: below the detection limit of 1 × 10^-5 hPa

The data point measured at 40 °C was not included in the linear regression because it was below the derection limit of 1 × 10^-5 hPa. The data point measured at 90 °C with decreasing temperature was only measured to exclude a decomposition of the test item. This data point was not included in the linear regression. The fact that the second measurement at 90 °C showed a lower vapor pressure than the first measurement is indication for a multi-component composition of the test item and the depletion of minor volatile components during the measurement.

From the measured data the parameters A, B and C of the Antoine equation can be derived by regression.

The evaluated Antoine parameters are listed in Table 2.

Table 2: Antoine parameters

A	2.93483
B	-2518.88
C	273.15

The vapour pressure values for 20, 25 and 50 °C (see Table 3) were extrapolated (values at 20 °C and 25 °C) and interpolated (value at 50 °C), using these Antoine constants A, B and C.

Table 3: Vapour pressures

T / °C	p / hPa	p / Pa
20	2.2 × 10^-6	2.2 × 10^-4
25	3.1 × 10^-6	3.1 × 10^-4
50	1.4 × 10^-5	1.4 × 10^-3

Executive summary:

The following vapour pressure values for the test item Disperse Red 153 were extrapolated (values at 20 °C and 25 °C) and interpolated (value at 50 °C) from the experimental data (vapour pressure: effusion method according to European Commission Regulation (EC) No. 440/2008, A.4. and OECD 104 (2006)):

T / °C	p / hPa	p / Pa
20	2.2 × 10^-6	2.2 × 10^-4
25	3.1 × 10^-6	3.1 × 10^-4
50	1.4 × 10^-5	1.4 × 10^-3

Description of key information

The vapour pressure of the test substance is 0.00022 Pa at 20°C

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

20 °C

Additional information

The vapour pressure values for the test item Disperse Red 153 were extrapolated (values at 20 °C and 25 °C) and interpolated (value at 50 °C) from the experimental data (vapour pressure: effusion method according to European Commission Regulation (EC) No. 440/2008, A.4. and OECD 104 (2006)):

T / °C	p / hPa	p / Pa
20	2.2 × 10^-6	2.2 × 10^-4
25	3.1 × 10^-6	3.1 × 10^-4
50	1.4 × 10^-5	1.4 × 10^-3