Boiling Temp of ETO @ .865 bar

Here's a plot of vapor pressure vs temperature C. 0.865 bar = 648 mmhg.http://www.unit-conversion.info/pressure.html
Vapor Pressure of Ethylene Oxide

Thanks Rixter! I must confess I went the complicated way, wanting to figure the value out using a complicated (to me) mathematical formula.... forgetting to do the more obvious like searching for a graph, as you did

The formula for vapor pressure is usually a simple exponential, wherein the energy barrier used is the heat of vaporization.

For transitions between a gas and a condensed phase with the approximations described above, the expression may be rewritten as

from the wikipedia article on the Clausius-Clapeyron relations (equations). In the above formula, R is the ideal gas constant, with the units is KJ/mole (or Kcal if L is Kcal), L is the latent heat of vaporization, T is absolute temperature (Kelvin degrees), and c is the logarithmic offset (normally called a scale factor to the exponential. This is accurate to first-order approximation, and the link included below has a more elaborate formula where the curvature of the coexistence line (second derivative) is included in considerations. Rixter already gave you a good enough answer though.

Ethylene oxide is nothing to be playing with at any pressure. Are you the Industrial Hygienist at your location? Are you dealing with a spill or a leak? I hope you and everyone else is able to stay upwind of this, and there are no civilians downwind.

Here's another form of the Clausius-Clapeyron Equation:

I plugged in the following values:

P1 = 1 bar

T1 = 283.86 °K

P2 = 0.865 Bar

ΔHv = 25.5 Kj/gmole

R = .0083145 Kj/gmole-°K

If I didn't make any errors... T2 = 280.1°K (= 6.9°C)

Thank you a lot ! We have applied the same equation, arriving to the same results.

I guess you already know that ETO is highly, highly toxic.

Not only toxic.... but also explosive! :-)

Hmmm.

One cannot help but wonder what your endevour is.

My guess is this MD is somehow responsible for attempting to kill very dangerous pathogens with ethylene oxide. My question is this: Is there anything worse you could try such as Polonium 210, or another alpha emitter that would make the place uninhabitable for a longer period of time than ethylene oxide. How do you propose to get rid of the EO? Are you going to use high intensity UV light - be warned that inducing free radicals in this will make it explode, IMHO.

Hello James Stewart, thank you for your concern and wise opinion!