just get pharm grade iso alcohol from the drug store. thats some the cleanest you can get over the counter. then as longs as you arent drinking it and you evaporate it all the way you are safe.
heres a little evaporation trick I use that will keep you from blowing up the house or something .....
take an old coffee maker and take the top part off so you are left with the burner with the on switch. use a pyrex dish on the burner with your goodies in that. get a bathroom exaust fan at home depot with some exaust tubing. place the fan above or by your dish and run the exaust out the window.
takes about 3 hours start to finish this way and you wont be breathing the fumes or burning the house down