This is a question we hear quite often here at Direct Hoses. We have put together a chart that displays common chemical compatibility with the hose that we supply.
Please take a look at the PDF that is located here
This contains a list of various chemicals, and lists them in a format that will tell you how damaging the chemical is to the particular type of hose/fitting.
It covers Polyurethane, Nylon, Polyvinyl Chloride (PVC) and Polyethylene for now. Please let us know your thoughts!