JENACHEM GmbH as a start up companyproduces and supplies chemicals for derivatizations in chromatography , for the protection of functional groups as well as solid phase materials. As a start JENACHEM GmbH offers diazomethane delivering tablets, so called Diazomethane Tabs which contain nitrosomethylurea in a polymeric matrix. In the same manner JENACHEM produces tabs for diazoethane and higher diazo-compunds like diazoethane, diazopropene, diazobutane and phenyldiazomethane.The novel incorporation into a polymeric support enables a simple and safe handling of the toxic starting substances. Furthermore shelf life increases significantly.