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The vapor pressures and pFT properties for trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) are measured using a metal-bellows cell. As for the vapor pressure, eight data points are obtained in the temperature range from (310 to 380) K and pressure range from (703 to 3458) kPa. The data of the vapor pressure is correlated by the Wagner type equation with the absolute average deviation of 0.02 %. By extrapolating the vapor-pressure correlation to the critical temperature, the critical pressure is determined to be 3632 kPa. The acentric factor is also determined to be 0.296 by using the vapor-pressure correlation. As for the pFT properties, 26 data points are obtained in the temperature range from (310 to 370) K and pressure range from (2000 to 5000) kPa. The data of the pFT properties are correlated by the Sato equation with the absolute average deviation of 0.04 %. Seven data points of the saturated liquid density are obtained by extrapolating the correlation of the pFT properties to the vapor pressure.

Measurements of the saturated vapor and liquid densities near the critical point for trans-1,3,3,3-tetrafluoropropene (CFHCHCF3; HFO-1234ze(E)) were carried out in the reduced temperature range of 0.962 < T/T c < 1 and in the reduced density range of 0.40 < ρ/ρc < 1.70. Taking into consideration the meniscus disappearing level as well as the intensity of the critical opalescence, the critical temperature T c and critical density ρc were determined experimentally. The critical pressure P c was calculated by extrapolating the vapor-pressure equation to the critical temperature. The critical parameters reported in this paper are T c = (382.51 ± 0.01) K, ρc = (486 ± 3) kg·m−3, V c = (235 ± 2) cm3·mol−1, and P c = (3632 ± 3) kPa. The saturated liquid density correlation is formulated using the present data. In addition, the critical exponent β along the coexistence curve was also discussed.

Attenuated expression of CL-1 closely correlates with the dedifferentiation and portal invasion of HCC. Down-regulated CL-1 expression may serve as a potential marker for a poor prognosis in HCC.