Reaction mass of pentasodium 2-{[4-chloro-6-(ethyl{3-[(2-sulfonatoethyl)sulfonyl]phenyl}amino)-1,3,5-triazin-2-yl]amino}-5-hydroxy-6-({2-sulfonato-4-[(4-sulfonatophenyl)diazenyl]phenyl}diazenyl)naphthalene-1,7-disulfonate and tetrasodium 2-[(4-chloro-6-{ethyl[3-(vinylsulfonyl)phenyl]amino}-1,3,5-triazin-2-yl)amino]-5-hydroxy-6-({2-sulfonato-4-[(4-sulfonatophenyl)diazenyl]phenyl}diazenyl)naphthalene-1,7-disulfonate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

calculation (if not (Q)SAR)

Remarks:

estimated by calculation

Adequacy of study:

key study

Study period:

20 January 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:

not specified

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Principles of method if other than guideline:

The vapour pressure calculated, using the Modified Watson Correlation. This method calculates the vapour pressure from the boiling point of the test item.

GLP compliance:

no

Type of method:

other: calculation-Modified Watson Correlation

Specific details on test material used for the study:

Identity: FAT 40824/A
Batch: Red ROE 805 BOP 04/05
Appearance: dark red powder
Purity: Organic part (Na-salt): approx. 82 %; Main component 1: approx. 36.2 %; Main component 2: approx. 27.5 %; Oligomers: 10 %
Expiration date: 01 October 2010
Storage: At room temperature at about 20 °C in a desiccator (hygroscopic)

Temp.:

25 °C

Vapour pressure:

0 Pa

Remarks on result:

other: The vapour pressure was calculated to be 1.8E-29 Pa at 25 degree C.

The boiling point of FAT 40824/A was calculated to be approximately 842°C using Meissner's method.

Conclusions:

The calculated vapour pressure of FAT 40824/A based on the boiling point calculated and using the Modified Watson Correlation is 1.8 E-29 Pa at 25 °C.

Executive summary:

The estimation of the vapour pressure of FAT 40824/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 40824/A was calculated to be approximately 842 °C using Meissner's method. The vapour pressure of FAT 40824/A was estimated to be 1.8x 10 ^-29 Pa at 25 °C based on the boiling point calculated and using the Modified Watson Correlation.

Description of key information

Although a vapour pressure determination is not required for a substance that does not melt at 300 °C or below, the vapour pressure was estimated by calculation based on Meissner's method, resulting in 1.8 E-29 Pa at 25 °C. For exposure assessment purposes the value 0.000000001 Pa is used (lowest value possible in field).

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

25 °C

Additional information

The estimation of the vapour pressure of FAT 40824/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 40824/A was calculated to be approximately 842 °C using Meissner's method. The vapour pressure of FAT 40824/A was estimated to be 1.8 x 10^-29 Pa at 25 °C based on the boiling point calculated and using the Modified Watson Correlation.