This should be easy: I'm looking for a one-stop source for thermo data (enthalpy, heat capacity, vapor pressure) and transport property data (viscosity, thermal conductivity) of potassium hydroxide(KOH)/water solutions.  The focus is on solutions that are 20% - 40% potassium hydroxide by weight, at approximately ambient temperatures (i.e., roughly -10°F to 110°F).  Data either in the form of regression equations or tabulated quantities will work fine.  

I'm wondering if anyone knows of a supplier that might have all of these data in a brochure or PDF file.

I could definitely use an enthalpy/concentration diagram as well (rather than construct one).

Try www.oxychem.com.

Good luck

Phillip Forsythe

Excellent call!  Thanks very much.  Still on the lookout for a ready-to-go concentration/enthalpy diagram, however.