You see I dought it is is alchol even though for years that was what I was told is in it. Isophthalic Acid makes much more sense from a cleaning standpoint. One gentelman that posted a lot of information about Seafoam always lists Isophthalic Acid when he is listing ingredients. I am familar with Crysilic(sp) acid and it's use in cleaning furnaces and itis also used in engnie cleaning products and fuel cleaners like Nutrea 131.