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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:
2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
and EU A.4 using the effusion method: Knudsen Cell
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
Iodobis(triphenylphospino)copper, BRUGGOLEN® H3301, Batch no. 16101213
Production date 12.10.2016
Expiry date 12.10.2026
Key result
Temp.:
20 °C
Vapour pressure:
0.001 Pa
Temp.:
25 °C
Vapour pressure:
0.001 Pa

Experimentally Determined Vapour Pressures

 T Standard Deviation p  RSD p 
 °C Pa  Pa 
 90.0 363.2  1.21E-02  2.59E-03  21.3 
 105.0 378.2  1.70E-02  2.64E-03  15.5 
 120.0 393.2  2.89E-02  7 .13E-03  24.6 
 135.0 408.2  4.25E-02  3.59E-03  8.4 
 150.0 423.2  6.51E-02  5.45E-03  8.4 
Conclusions:
The vapour pressure of the test item Iodobis(triphenylphospino)copper was determined at nine different temperatures (30-150°C) according to OECD 104 resp EU A.4 using the ef-fusion method (weight loss). Experiment 1-4 (nominal temperature 30-75 °C) showed only a poor reproducible weight loss. When visible contaminations, caused by explosive evapo-ration of the test item, were observed, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, these measurements were not used for calculations.
Five experiments could be evaluated as they showed relevant and reproducible weight loss. All evaluated experiments showed good reproducibility, giving relative standard devi-ations of less than 25 % and good correlation.
Therefore, the result of the test can be considered valid.
Executive summary:

The vapour pressure of Iodobis(triphenylphospino)copper was determined according to OECD 104 resp. EU A.4 using the effusion method (weight loss).

Vapour pressure was examined at nine different temperatures. Five temperatures could be evaluated as they showed reproducible weight loss. For these temperatures, 1/T was plot-ted against log (p).

Vapour Pressures (Effusion Method)

 Experiment T Mean p  Stand. Dev. p   RSD p
 No.  K Pa  Pa 
 5  363.2  1.21E-02  2.59E-03  21.3
 6

378.2

1.70E-02

 2.64E-03

 15.5

 7

 393.2

 2.89E-02

 7.13E-03

 24.6

 8

 408.2

 4.25E-02

 3.59E-03

 8.4

 9

 423.2

 6.51E-02

 5.45E-03

 8.4

In this table, E-0X represents multiplication with 10-x.

Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation

The graph 1/T vs. log (p) shows a straight line with a correlation coefficient of - 0.9969.

For the test item Iodobis(triphenylphospino)copper, the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:

Vapour pressure at 20 °C: 6.46 * 10-04Pa

Vapour pressure at 25 °C: 8.30 * 10-04Pa

Description of key information

Vapour pressure at 20 °C: 6.46 * 10-04Pa

Vapour pressure at 25 °C: 8.30 * 10-04Pa

Key value for chemical safety assessment

Vapour pressure:
0.001 Pa
at the temperature of:
20 °C

Additional information