Fluoromount-G Mounting Medium is a clear liquid medium designed for use in mounting slides following immunofluorescent staining. For convenience, this medium is provided with and without DAPI, a blue nuclear counter stain. It is water soluble and used to mount slides in which the final step of staining is aqueous. It forms a semi-permanent seal for prolonged storage of slides at 2-8°C. Fluoromount-G Mounting Medium does not fluoresce and may reduce the amount of fluorochrome quenching and photobleaching during fluorescence microscopy. This medium is supplied as a 1X stock solution containing sodium azide. The refractive index of Fluoromount-G Mounting Medium is reported to be ∼1.4, and it is best used when the thickness of the specimen is less than 10 μm.