With stirring, in a large beaker, 150 mL of 30% hydrogen peroxide is combined with 56 g of hexamine and 84 g of citric acid, the beaker is then immersed in an ice bath for 6h with occasional stirring. Then the mixture is filtered, washed with water and dried in air.
The beaker immersed in an ice bath
The mixture after being in the ice bath
Filtration and washing
The dry HMTD