You can find it on the internet. All you have to do is look.

1. Physical Properties of Molten-Salt Reactor Fuel, Coolant, and Flush ...
   
2. PDF] Molten Salt Coolants for High Temperature Reactors a
3. UndoMolten Salts and Ionic Liquids RWF Chemistry H2A

Thanks for the quick reply. I am trying to find vapor pressure data for molten sodium nitrite and potassium nitrate and their mixtures. I have already visited the 3 items you have listed. 1. pertains to flouride salts 2. mentions potassium nitrate but doesn't give any data 3. this is an overview of heat storage using molten salts.

4. http://www.bing.com/search?q=vapor+pressure+of+molten+salts&src=IE-Address

I had already tried this search string but I can't get it to lead me to specific information on sodium nitrite and potassium nitrate and their mixtures.

I found these (not free)

http://www.springerlink.com/content/n118q2606h7l4843/

http://www.springerlink.com/content/g63034v7082q2744/

by Googling 'Vapor pressure of potassium nitrate'. If interested, you could look further and also by 'vapor pressure of sodium nitrite'

Are you a "friend" of Timothy McVeigh?

That was ammonium nitrate (and diesel fuel); nothing to do with eutectic salts.

Thanks Tornado.

My bad.....I didn't do my homework like I should have!

Since it's for energy storage try this:

http://large.stanford.edu/publications/coal/references/docs/ES2008-54174-molten-salt-for-troughs.pdf

http://www.coal2nuclear.com/Molten%20Salt%20Survey%20-%20ORNL-TM-5682.pdf

http://www.patentgenius.com/patent/7588694.html

There's lots more if you Google on Solar energy thermal storage using eutectic salts.

The old (years 1960) french collection of reviews in mineral chemistry "Traité de Chimie Minérale Pascal"used to be rather detailed on such matters.

I am presently not far from the University of Paris XI at Orsay, but the librairy should be close for the summer's hollydays until the beginning of september.

I shall have a look at the books "metaux alcalins" and "azote" for the requested nitrites and nitrates.If these datas are not available there, I know no other source.

For most practical purposes, the vapor pressure of any molten salt can be taken to be zero. That wouldn't be true if you're running a high vacuum process and are concerned about contamination, but if you're only concerned about containing molten salts for thermal storage, the vapor pressure is low enough that zero will be a good approximation.