C6H12N4 – hexamethylenetetramine – is an odorless, white, crystalline compound also known as “solid fuel.” As it burns easily, it is popular among campers, hobbyists, and the military for heating camping food or military rations. Also known as urotropin, it is used in various fields, ranging from the production of phenol-formaldehyde resins to pyrotechnics. It is also used in medicine as an antiseptic.