Glacial acetic acid for household use?

A 5% glacial acetic solution would be the same a vinegar. The biggest thing to be careful of is the fumes. Glacial acetic is alot more volital that vinegar so do your mixing in a very well ventalated area. You probably won't burn any holes in your floor, but it wouldn't suprise me if a wood floor was more discolored by a spill.