(p-ammoniophenyl)bis(2-hydroxyethyl)ammonium sulphate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2010-02-22 to 2010-03-10

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study performed by means of differential scanning calorimetry according to the test method A.4 'Vapour Pressure according to the Dynamic Method' as described in the Official Journal of the European Communities.

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

GLP compliance:

yes (incl. QA statement)

Remarks:

Included in study report

Type of method:

dynamic method

Temp.:

20 °C

Vapour pressure:

<= 65 Pa

The test item N,N-Bis(2 -hydroxyethyl)-p-phenylenediamine sulphate monohydrate is a light grey powder at room temperature. It was not fused before weighing. The test item shows the earliest possible boiling at 125 deg C (at 986 mbar).

The experimentally determined vapour pressure of the test item N,N-Bis(2 -hydroxyethyl)-p-phenylenediamine sulphate monohydrate at 20 deg C of 2.5X10 ^-6 mbar (see DSC diagrams 1 & 2 'Experimental determined vapour pressure curve') is not in the recommended range of 1 to 1000 mbar for DSC measurements.

Therefore an estimation procedure according to the test method A.4 'Vapour Pressure according to the Dynamic Method' as described in the Official Journal of the European Communities L383A, Appendix 1, Estimation Method, newest version (Robert S. Boethling, Donald Mackay, Handbook of Property Estimation Methods for Chemicals, Lewis Publishers, year of publication 2000, Cap. 3 - Vapour Pressure, Grain-watson Method, p53 -65) was used. This method is applied for vapour pressures between 10³ to 10 ^-7 mbar.

Conclusions:

The test item N,N-Bis(2-hydroxyethyl)-p-phenylenediamine sulphate monohydrate has a vapour pressure of <=65 Pa (0.65 mbar) at 20 deg C according to the definition in the EEC Directive 92/69/EEC, method A.4 (Grain Watson estimation).

Executive summary:

The vapour pressure of the test item N,N-Bis(2 -hydroxyethyl)-p-phenylenediamine sulphate monohydrate was determined by means of differential scanning calorimetry (DSC) according to the test method A.4 'Vapour Pressure according to the Dynamic Method' as described in the Official Journal of the European Communities L383A. The test item N,N-Bis(2-hydroxyethyl)-p-phenylenediamine sulphate monohydrate has a vapour pressure of <=65 Pa (0.65 mbar) at 20 deg C according to the definition in the EEC Directive 92/69/EEC, method A.4 (Grain Watson estimation).

Description of key information

The test item N,N-Bis(2-hydroxyethyl)-p-phenylenediamine sulphate monohydrate has a vapour pressure of <= 65 Pa (0.65 mbar) at 20 deg C according to the definition in the EEC Directive 92/69/EEC method A.4 (Grain Watson estimation)

Key value for chemical safety assessment

Vapour pressure:

65 Pa

at the temperature of:

20 °C

Additional information

The vapour pressure of the test item N,N-Bis(2 -hydroxyethyl)-p-phenylenediamine sulphate monohydrate was determined by means of differential scanning calorimetry (DSC) according to the test method A.4 'Vapour Pressure according to the Dynamic Method' as described in the Official Journal of the European Communities L383A. The test item N,N-Bis(2-hydroxyethyl)-p-phenylenediamine sulphate monohydrate has a vapour pressure of <=65 Pa (0.65 mbar) at 20 deg C according to the definition in the EEC Directive 92/69/EEC, method A.4 (Grain Watson estimation).