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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental phase: 26 June 2020 to 06 July 2020
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
Key result
Test no.:
#10
Temp.:
ca. 25 °C
Vapour pressure:
<= 0.004 Pa
Remarks on result:
other:
Remarks:
Result extrapolated to 25 degC

Results for Run 10



Run 10 was chosen for the vapour pressure determination because the sample had been under vacuum for the longest period prior to this run and so degassing would have been the most complete.


 


Table: Vapour Pressure Data for Run 10

















































































































 Temperature
(ºC)		 Temperature
(K)		 Reciprocal
Temperature
(K-1)		 Mass
Difference
(µg)		 Mass
Difference
(kg)		Vapour
Pressure
(Pa) 		 Log10 Vp
 100 373.15 0.00268014.78  1.478e-08 0.02052 -1.68782
 101 374.15 0.002673 9.78 9.78e-09 0.01358 -1.86710
 102 375.15 0.002666 8.29 8.29e-09 0.01151 -1.93892
 103 376.15 0.002659 7.49 7.49e-09 0.01040 -1.98297
 104 377.15 0.002651 5.39 5.39e-09 0.00748 -2.12610
 105 378.15 0.002644 6.39 6.39e-09 0.00887 -2.05208
 106 379.15 0.002637 9.58 9.58e-09 0.01330 -1.87615
 107 380.15 0.002631 5.49 5.49e-09 0.00762 -2.11805
 108 381.15 0.002624 6.69 6.69e-09 0.00929 -2.03198
 109 382.15 0.002617 7.29 7.29e-09 0.01012 -1.99482
 110 383.15 0.002610 6.49 6.49e-09 0.00901 -2.04528
Conclusions:
The vapour pressure of the test item has been determined to be less than 4.4 x 10-3 Pa at 25 °C.
Executive summary:

Introduction


The vapour pressure of N,N'-(2-(4-(2-aminobenzamido)butyl)pentane-1,5-diyl)bis(2- aminobenzamide) was determined using a method designed to be compatible with the following:



  • Method A.4 Vapour Pressure of Commission Regulation (EC) No 440/2008 (as amended) of 30 May 2008

  • Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.


 


 


Method


The vapour pressure was determined using a vapour pressure balance. The temperature of the sample was controlled electronically.  A preliminary run was undertaken over the temperature range 25 to 110 °C to provide information for a suitable temperature range for the determination.


 


A sequence of runs was started after a sample of test item had been under vacuum for approximately 151 hours. Temperature and pressure readings were taken between 100 °C and 110°C with a one-hour dwell at 100°C between runs.


 


Results and Conclusion


The vapour pressure of the test item has been determined to be less than 4.4 x 10-3 Pa at 25 °C.

Description of key information

Key value for chemical safety assessment

Vapour pressure:
0.004 Pa
at the temperature of:
25 °C

Additional information

The vapour pressure of the test item has been determined to be less than 4.4 x 10^-3 Pa at 25 °C.