I could be total wrong on this one, but I thought I read or heard somewhere that denatured alcohol is a high proof alcohol that has been made unfit for human consumption. No reference of methanol. If it did have charactoristics like methanol, I'd hate to be someone who works with and cuts shellacs all day. I've primed a kitchen with BIN, and even with fans in the window, I still got a buzz by the time I was finished. The doc says that my eyes look great, even with my diabetes.