Reaction mass of disodium 2-[[2-hydroxy-3-[[methyl-(2-oxido-2-oxoethyl)amino]methyl]-5-nonylphenyl]methyl-methylamino and sodium 2-[(2-hydroxy-5-nonylphenyl)methyl-methylamino]acetate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Remarks:

FINAL REPORT STUDY STILL REQUIRED

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 June 2018 to 05 July 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

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

Specific details on test material used for the study:

Batch number: 99101243
Purity: 76.39% (the balance being water)
Expiry Date: 23 November 2019
In order to achieve equilibrium in this method the test item was put under vacuum resulting in removal of water. As such the vapour value relates to the composition of the registered substance as reported in section 1.2 of this registration dossier.

Key result

Temp.:

20 °C

Vapour pressure:

ca. 0.007 Pa

Key result

Temp.:

25 °C

Vapour pressure:

ca. 0.009 Pa

Key result

Temp.:

50 °C

Vapour pressure:

ca. 0.019 Pa

Run	Log₁₀ vapour pressure
	20 °C	25 °C	50 °C
4	-2.11	-2.02	-1.68
5	-2.10	-2.04	-1.68
6	-2.08	-2.01	-1.72
7	-2.22	-2.12	-1.73
8	-2.15	-2.07	-1.77
9	-2.09	-2.04	-1.76
10	-2.24	-2.15	-1.78
Mean	-2.14	-2.06	-1.73
Vapor Pressure	7.2E-03 Pa	8.63E-3 Pa	1.9E-02 Pa

 

The test item did not change in appearance under the conditions used in the determination. A total of 10 runs were completed for the main sequence. Equilibrium was deemed to have been reached over the final 7 runs, thus, the final 7 runs have been used to calculate the vapor pressure. Some of the runs required points to be removed due to being erroneous.

Conclusions:

The vapor pressure of the substance has been determined to be 8.6E-3 Pa at 25 °C, measured using the vapor pressure balance method, in a GLP study designed to be compatible with EC Method A.4 and OECD 104. From the test data, the vapour pressure of the substance at 25 °C and 50 °C was calculated to be 7.2E-3 Pa and 1.9E-2 Pa, respectively, using the same method used in the study.

Executive summary:

The vapor pressure of the substance has been determined to be 8.6E-3 Pa at 25 °C, measured using the vapor pressure balance method, in a GLP study designed to be compatible with EC Method A.4 and OECD 104. From the test data, the vapour pressure at 25 °C and 50 °C was calculated to be 7.2E-3 Pa and 1.9E-2 Pa, respectively, using the same method used in the study.

Description of key information

The vapor pressure of the test item has been determined to be 8.6 mPa at 25 °C

Key value for chemical safety assessment

Vapour pressure:

0.009 Pa

at the temperature of:

25 °C