Tetrasodium [2-({4-fluoro-6-[(2-{[4-fluoro-6-({5-(hydroxykappaO)-6-[(2-{[2-(hydroxy-kappaO)-5-sulfophenyl] diazenyl-kappaN1}-4,5-dimethoxyphenyl) diazenyl-kappaN2]-7-sulfo-2-naphthyl} amino)-1,3,5-triazin-2-yl] amino} propyl) amino]-1,3,5-triazin-2-yl} amino) benzene-1,4- disulfonato(6-)] cuprate(4-)

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Study completion date - 16 June 2006

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

accepted calculation method

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Principles of method if other than guideline:

If the vapour pressure of FAT 40825/A is expected to be so small that the value is below the measurement range of an experimental determination (e.g. the gas saturation method), then the vapour pressure can also be calculated, using the Modified Watson Correlation. This method is described by Lyman et al. (1990).

GLP compliance:

no

Type of method:

other: Calculated using the Modified Watson Correlation

Specific details on test material used for the study:

Identity: FAT 40825/A
Batch number: CHU 297 / BOP 04/05
Purity: Organic part (Na-salt): approx. 83.7 %; All coloured components: approx. 80.54 %; Main component: approx. 59.1 %.
Appearance: Solid, black powder
Storage conditions: At room temperature at about 20 °C
Expiration date: December 31, 2010

Test no.:

#1

Temp.:

25 °C

Vapour pressure:

< 0 Pa

Remarks on result:

other: 1.73E-32 Pa

Conclusions:

The vapour pressure of FAT 40825/A was estimated to be: 1.73 x 10E-32 Pa at 25 °C

Executive summary:

The estimation of the vapour pressure of FAT 40825/A was based on the EEC directive 92/69, Part A, Methods for the determination of physico-chemical properties, A.4 "Vapour Pressure", EEC Publication No. L383, December 1992 and the OECD Guideline No. 104, "Vapour Pressure", adopted July 27, 1995. The boiling point of FAT 40825/A was calculated to be approximately 897 °C using Meissner's method. The vapour pressure of FAT 40825/A was estimated to be 1.73 ×10^-32 Pa at 25 °C based on the boiling point calculated and using the Modified Watson Correlation.

Description of key information

Vapour pressure: 1.73E-32 Pa at 25 °C. As key value 0.000000001 Pa is used, the smallest possible value in the respective field.

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

20 °C

Additional information

The estimation of the vapour pressure of FAT 40825/A was based on the EEC directive 92/69, Part A, Methods for the determination of physico-chemical properties, A.4 "Vapour Pressure", EEC Publication No. L383, December 1992 and the OECD Guideline No. 104, "Vapour Pressure", adopted July 27, 1995. The boiling point of FAT 40825/A was calculated to be approximately 897 °C using Meissner's method. The vapour pressure of FAT 40825/A was estimated to be 1.73×10^-32 Pa at 25 °C based on the boiling point calculated and using the Modified Watson Correlation.