1-Hexene, 3,3,4,4,5,5,6,6-octafluoro-6-iodo-

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2014

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: No guideline was reported, but the study was well documented and similar to OECD Guideline 104. Therefore this study is classified as reliable with restrictions.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2014

Report date:

2014

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

not specified

GLP compliance:

not specified

Type of method:

dynamic method

Test material

Test material information

Constituent 1

Reference substance name:

3,3,4,4,5,5,6,6-octafluoro-6-iodohex-1-ene

EC Number:

941-221-0

Cas Number:

203929-12-8

Molecular formula:

C6H3F8I

IUPAC Name:

3,3,4,4,5,5,6,6-octafluoro-6-iodohex-1-ene

Test material form:

not specified

Details on test material:

- Name of test material (as cited in study report): lodoctafluorhexen
- Other: Test substance is oxygen, light, and temperature sensitive

Results and discussion

Vapour pressure

Temp.:

20 °C

Vapour pressure:

0.89 kPa

Any other information on results incl. tables

Table 1. Experimental vapor pressure and temperature data points.

Temp (°C)	Pressure (mbar)
30.68	16.66
34.31	20.39
47.01	39.5
61.59	78.18
75.7	141.6
92.56	267.5
104.83	407.3
114.21	548.8
121.95	692.2
128.09	825.5
75.89	141.6

*Measurement was repeated to check whether there were significant changes at pressures above 550 mbar (corresponding to temperatures above 115 °C) due to the temperature readings drifting slightly. The boiling temperature was 0.19° C higher in the repeated measurement than in the first measurement. The substance was also somewhat more yellow after the experiment. Both observations point to possible changes to the test substance.

The recorded data excluding the repeat measurement were fit to the Antoine equation, ln(Pvap [Pa]) = A - B / (C + T [K])

Vapor pressure (Pvap): Pvap [Pa] = exp(20.8255 – 3178.69 / (-66.7278 + T [K])

Calculated R² = 0.99971

Applicant's summary and conclusion

Conclusions:

The vapor pressure of IOFH is 0.89 kPa at 20 °C.

Executive summary:

The vapor pressure of IOFH was extrapolated from the measured data for the compound using the dynamic method. Vapor pressure and temperature were recorded at a variety of equilibrium points at temperatures between 30.7 and 128 °C and fit to the Antoine equation. The resulting equation wasPvap [Pa] = exp(20.8255 – 3178.69 / (-66.7278 + T [K]). No method was reported, but the dynamic method is approved for this endpoint per OECD TG 104. No information about GLP compliance was available. Therefore, the study is classified as acceptable with restrictions.