Pentasodium 2,2'-((2,4-diamino-5-(4-methoxy-2-sulfophenylazo)-1,3-phenylene)bis(azo))bis(5-(2-(sulfonatooxyethyl)sulfonyl)benzenesulfonate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From April 11, 2006 to June 27, 2006

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:

yes (incl. QA statement)

Type of method:

effusion method: vapour pressure balance

Temp.:

113.6 °C

Vapour pressure:

0 Pa

Remarks on result:

other: Measured vapour pressure at the corresponding temperature

Temp.:

122.4 °C

Vapour pressure:

0.001 Pa

Remarks on result:

other: Measured vapour pressure at the corresponding temperature

Temp.:

130.3 °C

Vapour pressure:

0.001 Pa

Remarks on result:

other: Measured vapour pressure at the corresponding temperature

Temp.:

136 °C

Vapour pressure:

0.001 Pa

Remarks on result:

other: Measured vapour pressure at the corresponding temperature

Temp.:

139.9 °C

Vapour pressure:

0.002 Pa

Remarks on result:

other: Measured vapour pressure at the corresponding temperature

Temp.:

143.6 °C

Vapour pressure:

0.002 Pa

Remarks on result:

other: Measured vapour pressure at the corresponding temperature

Temp.:

144.2 °C

Vapour pressure:

0.003 Pa

Remarks on result:

other: Measured vapour pressure at the corresponding temperature

Temp.:

144.6 °C

Vapour pressure:

0.003 Pa

Remarks on result:

other: Measured vapour pressure at the corresponding temperature

The vapour pressure was measured in the temperature range of 13.5 °C to 145 °C. Above 113°C, a vapour pressure could be measured. The calculated vapour pressure values were extrapolated:

Temperature (°C)	Vapour pressure (hPa)	Vapour pressure (Pa)
20	1.6x10^-9	1.6x10^-7
25	2.8x10^-9	2.8x10^-7
50	3.3x10^-8	3.3x10^-6

Conclusions:

Under the conditions of the test, the calculated vapour pressure values for the test substance were 1.6x10-7, 2.8x10-7 and 3.3x10-6 Pa at 20, 25 and 50°C, respectively.

Executive summary:

A study was conducted to determine the vapour pressure of the test substance according to OECD Guideline 104 and EU Method A.4, in compliance with GLP. The determination of vapor pressure was carried out according to the effusion method (vapour pressure balance).

The vapour pressure was measured in the temperature range of 13.5°C to 145°C. Above 113°C, a vapour pressure could be measured.

Under the conditions of the test, the calculated vapour pressure values of the test substance were 1.6x10-7, 2.8x10-7 and 3.3x10-6 Pa at 20, 25 and 50°C, respectively.

Description of key information

The calculated vapour pressure values for the test substance were 1.6x10-7, 2.8x10-7 and 3.3x10-6 Pa at 20, 25 and 50°C, respectively (Smeykal, 2006).

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

20 °C