"Skydrol also stings more when you get it in your eyes than 5606"
I have been reliably informed it stings even more when you get Skydrol or Exxon Hyjet on your wedding tackle!
Try
http://www.skydrol.com/pages/default.asp
Why not try using a search engine, like Google with the spec numbers eg. MIL-H-5606, this one turned up an American Gov docs on aviation type hyd fluids.