Iodonium, bis[4-(1,1-dimethylethyl)phenyl]-, hexafluorophosphate(1-) (1:1)

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

01 Dec 2011 - 13 Dec 2011

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP study according to EU and OECD methods

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

(2008)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

(2006)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Department of Health, UK GLP Monitoring Authority (2011)

Type of method:

effusion method: vapour pressure balance

Test material

Test material information

Constituent 1

Reference substance name:

bis(4-tert-butylphenyl)iodanium; hexafluoro-λ⁵-phosphanuide

EC Number:

620-341-4

Cas Number:

61358-25-6

Molecular formula:

C20H26F6IP

IUPAC Name:

bis(4-tert-butylphenyl)iodanium; hexafluoro-λ⁵-phosphanuide

Details on test material:

- Name of test material (as cited in study report): PF-6
- Chemical name: Bis(4-tert-butylphenyl)iodonium Hexafluorophosphate
- Physical state: white powder
- Analytical purity: 99.2 %
- Batch No.: 20101020
- Expiration date of the batch: 12 April 2012
- Storage condition of test material: Room temperature in the dark

Results and discussion

Vapour pressure

Temp.:

25 °C

Vapour pressure:

< 0 Pa

Any other information on results incl. tables

No statistical analyses were performed because the balance readings were too low and variable for a line of best fit to have any meaning. Instead it was considered more appropriate to impose a regression slope on a chosen data point to provide an estimate of the maximum value for the vapour pressure at 25 °C.

 

Run 10 was chosen because the sample had been under vacuum for the longest period prior to this run and so degassing would have been the most complete. The reading at 143 °C (416.15 K) was chosen because this is the data point which gives the highest estimated vapour pressure at any given temperature when a slope of -1500 K is imposed upon it.

 

The value of -1500 K is an in-house value and is the shallowest slope observed whilst determining the vapour pressure on a wide range of samples using the vapour pressure balance method. Extrapolation to 25 °C gave a vapour pressure of 2.573 x 10^-4 Pa which has been taken as a maximum for this material.

 

The test item did not change in appearance under the conditions used in the determination.

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the test item has been determined to be < 2.6 x 10^-4 Pa at 25 °C.