Hexamethylenetetramine or methenamine is a
heterocyclic organic compound with the formula (CH
2)
6N
4. This white
crystalline compound is highly soluble in water and polar organic solvents. It has a cage-like structure similar to
adamantane. It is useful in the synthesis of other chemical compounds, e.g., plastics, pharmaceuticals, rubber additives. It
sublimes in vacuum at 280 °C.