The May-Grünwald′s eosin methylene blue staining dye for microscopy, is used to make a stain that is frequently used for diagnostic purposes in the area of hematology. When used in hematological applications, May-Grünwald’;s stain is frequently used in combination with other staining solutions, e. g. with Giemsa’;s solution for Pappenheim (MGG) overview staining. This staining solution generally stains the nuclei red to violet, based on the molecular interaction between the Eosin Y dye and an Azure B-DNA complex. Both dyes assemble to an Eosin Y - Azure B-DNA complex and the intensity of the resulting stain depends on the content of Azure B and the ratio of Azure B : Eosin Y. Furthermore, the resulting stain can vary depending on the influence of fixation, staining times, pH-value of the solutions or buffer substances. As a CE-certified, IVD-registered product, it can be used in diagnostics and laboratory accreditations without constraints. For more details, please see instructions for use (IFU). The IFU can be downloaded from this webpage.