CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed. (July 2007) ( Learn how and when to remove this template message ) Esbit brand Hexamine tablets A hexamine fuel tablet is a form of solid fuel in tablet form. The tablets burn smokelessly, have a high energy density , do not liquefy while burning and leave no ashes . Invented in Murrhardt, Germany , in 1936, the main component is hexamine , which was discovered by Aleksandr Butlerov in 1859. Some fuel tablets use 1,3,5-trioxane as another ingredient. A number of alternative names are in use, including heat tablet and Esbit . Esbit is a genericized trademark as it is used to refer to similar pro...