The MDMA purity test is one of the newest kits available in the EZ test range. It has been developed to identify purity levels on MDMA. The information sheet and colour chart included, will correspond to the various purity levels that might be expected. All EZ tests use a chemical reagent absorbed in silica gel, which is held inside a glass ampoule. When a sample is added to these chemicals inside the ampoule if a reaction occurs a colour change will take place. This colour should be compared to the colour chart included on the instructions within the package, to give an indication as what could be in the sample.