Oil red O (isopropanol) is a chemical solution used in histology and medical diagnostics for the visualization of lipids. Consisting of Aqua bidest / ultrapure water, isopropanol and Oil Red O (C.I.: 26125), the solution provides excellent selectivity at a certain concentration. Here, the fat-soluble Oil Red O passes through the lipid bilayer in the cell membranes and accumulates in the lipid droplets, causing them to appear red under the microscope. Therefore, the solution is especially suitable for scientific laboratory work where differentiation of lipids in tissue sections is necessary. With this chemical property, Oil Red O (isopropanol) acts as a valuable tool in research. It is particularly useful, for example, in the study of fatty liver disease, lipid metabolism disorders, and other clinical questions dealing with fat metabolism. Overall, the solution thus provides an in-depth and differentiated insight into lipid-containing tissues.