Propanenitrile, 2,3,3,3-tetrafluoro-2-(trifluoromethyl)-

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2013

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study well documented, meets generally accepted scientific principles, acceptable for assessment.

Qualifier:

equivalent or similar to guideline

Guideline:

other: OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

not specified

Principles of method if other than guideline:

The boiling point of the test substance was determined by the static method using a static pressure cell. The sample was degassed by repeated evacuation of the cooled pressure cell to remove any air or inert gas from the sample. A static apparatus was used for the measurements. The apparatus was reported to be suitable at temperatures between 200 K and 500K and pressures up to 20 MPa. The degassed sample was charged into the evacuated static pressure cell, which was placed in a thermostatic oil bath. The pressure inside the cell was monitored using a pressure sensor (model PDCR 4010, pressure range 0 to 3.5 MPa). The pressure sensor was calibrated with a pressure balance (model 8000S or 21000, D&H). The temperature is measured with a Pt100 resistance thermometer (model 1502A, Hart Scientific). Known quantities of the liquid were injected into the equilibrium cell by a piston injector pump (model ISCO 260D pump). 17 vapor-liquid equilibrium measurements were made.

GLP compliance:

no

Type of method:

other: static method

Boiling pt.:

-4.7 °C

Atm. press.:

760 mm Hg

17 temperature and vapor pressure pairs were measured at vapor-liquid equilibriums.

T / K	T / °C	P / kPa
233.69	-39.46	18.6
237.18	-35.98	22.5
244.70	-28.45	33.6
247.76	-25.39	39.3
253.98	-19.17	52.8
258.49	-14.66	65.6
262.76	-10.39	78.6
269.34	-3.81	105.2
273.32	0.17	124.7
277.45	4.30	144.7
283.21	10.06	180.2
287.39	14.24	207.9
293.18	20.03	253.1
298.86	25.71	303.6
308.12	34.97	401.7
316.12	42.97	503.6
323.80	50.65	618.5

 

The data are fit by the Antoine equation:

log (P/Torr) = A – B / (C + T/°C).

 

The resulting equation from these results is:

 

P (Torr) = 10^(6.74744-836.484/ (221.004 + T) <T in °C>

 

Therefore, the interpolated boiling temperature of C4 F-isonitrile is -4.7°C at 760 mm Hg.

Conclusions:

The interpolated boiling point of C4 F-isonitrile is -4.7°C at 760 mm Hg.

Executive summary:

The boiling point of C4 F-isonitrile was determined using a static pressure cell. The boiling point of C4 F-isonitrile was interpolated from the measured vapor pressure and temperature values at vapor-liquid equilibriums. The data are fit by the Antoine equation: log (P) = A – B / (C + T). The interpolated boiling point of C4 F-isonitrile is -4.7°C at 760 mm Hg.

 

No guideline was followed, but the study was well documented and similar to OECD Guideline 104: “Vapour pressure”. Therefore this study is classified as reliable with restrictions

Description of key information

The interpolated boiling point of C4 F-isonitrile is -4.7°C at 760 mm Hg.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

-4.7 °C

Additional information

The boiling point of C4 F-isonitrile was determined to be -4.7 °C at 760 mm Hg using a static pressure cell. The boiling point of C4 F-isonitrile was interpolated from the measured vapor pressure and temperature values at vapor-liquid equilibriums. The data are fit by the Antoine equation: log (P) = A – B / (C + T). The interpolated boiling point of C4 F-isonitrile is -4.7°C at 760 mm Hg. No guideline was followed, but the study was well documented and similar to OECD Guideline 104: “Vapour pressure”. Therefore this study is classified as reliable with restrictions