NAPHRAX is a specially formulated solution ideal for diatom embedding. It is composed of acetic acid, naphthalene, paraformaldehyde, p-toluenesulfonic acid monohydrate and ethyl methyl ketone, which enable effective yet gentle embedding of the filigree structures. With a refractive index of 1.67, the product finds particular application when good visibility of the diatom structures is required. The chemical structure of the solution ensures optimal embedding of the specimens, which is important when studying the unique structures of diatoms. The clarity of the specimens obtained enables high-quality, reliable examinations in medical diagnostics, histology, metallography and laboratories. In addition, the solution is an important part of the preparation kit for diatoms.