(1E)-1-chloro-3,3,3-trifluoroprop-1-ene

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Principles of method if other than guideline:

The vapour pressure of the test substance was measured using a vessel fitted with a previously calibrated pressure transducer and immersed in a thermostated bath. A sufficient amount of a degassed sample of test substance is introduced into the vessel so that the vessel will be between 10 % and 80 % liquid filled at all temperatures of interest. The vessel is given sufficient time to reach thermal equilibrium and the pressure and temperature are recorded. The bath temperature is then changed to the next desired temperature and the procedure is repeated. The pressure was measured using a MKS pressure transducer (model 628RCTBE1B), which was heated to 100 °C to avoid condensation. The temperature of the bath was measured using a platinum thermometer which has an uncertainty of ± 0.001 °C. The MKS pressure transducer was calibrated using a dead weight tester and determined to have an uncertainty of ± 0.25 %.

GLP compliance:

no

Type of method:

other: pressure transducer

Key result

Temp.:

19.93 °C

Vapour pressure:

ca. 1 065 hPa

Vapour pressures at different temperatures:

Temperature [°C]	Vapour pressure [psia]	Vapour pressure [hPa]
-10.05	4.33	298
-0.05	6.9	475
9.93	10.55	727
19.93	15.45	1065
29.86	22.06	1520
39.78	30.47	2100
49.85	40.92	2821
59.78	55.5	3826
69.77	72.85	5022
79.69	93.02	6413

Conclusions:

The test substance has a vapuor pressure of 1065 hPa at a temperature of 19.93 °C.

Executive summary:

The vapour pressure of the test substance was measured using a vessel fitted with a previously calibrated pressure transducer and immersed in a thermostated bath. A sufficient amount of a degassed sample of test substance is introduced into the vessel so that the vessel will be between 10 % and 80 % liquid filled at all temperatures of interest. The vessel is given sufficient time to reach thermal equilibrium and the pressure and temperature are recorded. The bath temperature is then changed to the next desired temperature and the procedure is repeated. From this test, at different temperatures, a range of vapour pressures was determined. The test substance has a vapour pressure of 1065 hPa at 19.93 °C.

Description of key information

The test substance has a vapour pressure of 1065 hPa at 19.93 °C.

Key value for chemical safety assessment

Vapour pressure:

1 065 hPa

at the temperature of:

19.93 °C

Additional information

The vapour pressure of the test substance was measured using a vessel fitted with a previously calibrated pressure transducer and immersed in a thermostated bath (Honeywell Buffalo Research Laboratory, 2011). A sufficient amount of a degassed sample of test substance is introduced into the vessel so that the vessel will be between 10 % and 80 % liquid filled at all temperatures of interest. The vessel is given sufficient time to reach thermal equilibrium and the pressure and temperature are recorded. The bath temperature is then changed to the next desired temperature and the procedure is repeated. From this test, at different temperatures, a range of vapour pressures was determined.